Square Ring Size Chart (AS568 Dash)

Square ring size chart using AS568 dash numbers with ID, square-wall CS, and OD in inches and millimeters.

History of square rings AS568 Size Chart Master O-Ring Size Chart

Square rings use a square-cut wall instead of a round cord. They share AS568 dash numbers and IDs with standard O-Rings, but the CS (wall) is typically a bit thinner for gland fit.

CS values are square-profile walls, not round-cord AS568 CS. Compare with the AS568 O-Ring chart before substituting.

374 sizes · Square Ring

0xx series

50 sizes

Square Ring 0xx series size table
Dash	Code	Nom ID	Nom CS	ID (in)	CS (in)	OD (in)	ID (mm)	CS (mm)	OD (mm)
-001	AS568-001	1/32	—	0.029 ±.004	0.037 ±.003	0.103	0.74 ±0.10	0.94 ±0.08	2.62
-002	AS568-002	3/64	—	0.042 ±.004	0.047 ±.003	0.136	1.07 ±0.10	1.19 ±0.08	3.46
-003	AS568-003	1/16	—	0.056 ±.004	0.057 ±.003	0.170	1.42 ±0.10	1.45 ±0.08	4.32
-004	AS568-004	5/64	—	0.070 ±.005	0.066 ±.003	0.202	1.78 ±0.13	1.68 ±0.08	5.13
-005	AS568-005	3/32	—	0.101 ±.005	0.066 ±.003	0.233	2.57 ±0.13	1.68 ±0.08	5.92
-006	AS568-006	1/8	—	0.114 ±.005	0.066 ±.003	0.246	2.90 ±0.13	1.68 ±0.08	6.25
-007	AS568-007	5/32	—	0.145 ±.005	0.066 ±.003	0.277	3.68 ±0.13	1.68 ±0.08	7.03
-008	AS568-008	3/16	—	0.176 ±.005	0.066 ±.003	0.308	4.47 ±0.13	1.68 ±0.08	7.82
-009	AS568-009	7/32	—	0.208 ±.005	0.066 ±.003	0.340	5.28 ±0.13	1.68 ±0.08	8.63
-010	AS568-010	1/4	—	0.239 ±.005	0.066 ±.003	0.371	6.07 ±0.13	1.68 ±0.08	9.42
-011	AS568-011	5/16	—	0.301 ±.005	0.066 ±.003	0.433	7.65 ±0.13	1.68 ±0.08	11.00
-012	AS568-012	3/8	—	0.364 ±.005	0.066 ±.003	0.496	9.25 ±0.13	1.68 ±0.08	12.60
-013	AS568-013	7/16	—	0.426 ±.005	0.066 ±.003	0.558	10.82 ±0.13	1.68 ±0.08	14.17
-014	AS568-014	1/2	—	0.489 ±.005	0.066 ±.003	0.621	12.42 ±0.13	1.68 ±0.08	15.77
-015	AS568-015	9/16	—	0.551 ±.007	0.066 ±.003	0.683	14.00 ±0.18	1.68 ±0.08	17.35
-016	AS568-016	5/8	—	0.614 ±.009	0.066 ±.003	0.746	15.60 ±0.23	1.68 ±0.08	18.95
-017	AS568-017	11/16	—	0.676 ±.009	0.066 ±.003	0.808	17.17 ±0.23	1.68 ±0.08	20.52
-018	AS568-018	3/4	—	0.739 ±.009	0.066 ±.003	0.871	18.77 ±0.23	1.68 ±0.08	22.12
-019	AS568-019	13/16	—	0.801 ±.009	0.066 ±.003	0.933	20.35 ±0.23	1.68 ±0.08	23.70
-020	AS568-020	7/8	—	0.864 ±.009	0.066 ±.003	0.996	21.95 ±0.23	1.68 ±0.08	25.30
-021	AS568-021	15/16	—	0.926 ±.009	0.066 ±.003	1.058	23.52 ±0.23	1.68 ±0.08	26.87
-022	AS568-022	1	—	0.989 ±.010	0.066 ±.003	1.121	25.12 ±0.25	1.68 ±0.08	28.47
-023	AS568-023	1-1/16	—	1.051 ±.010	0.066 ±.003	1.183	26.70 ±0.25	1.68 ±0.08	30.05
-024	AS568-024	1-1/8	—	1.114 ±.010	0.066 ±.003	1.246	28.30 ±0.25	1.68 ±0.08	31.65
-025	AS568-025	1-3/16	—	1.176 ±.011	0.066 ±.003	1.308	29.87 ±0.28	1.68 ±0.08	33.22
-026	AS568-026	1-1/4	—	1.239 ±.011	0.066 ±.003	1.371	31.47 ±0.28	1.68 ±0.08	34.82
-027	AS568-027	1-5/16	—	1.301 ±.011	0.066 ±.003	1.433	33.05 ±0.28	1.68 ±0.08	36.40
-028	AS568-028	1-3/8	—	1.364 ±.013	0.066 ±.003	1.496	34.65 ±0.33	1.68 ±0.08	38.00
-029	AS568-029	1-1/2	—	1.489 ±.013	0.066 ±.003	1.621	37.82 ±0.33	1.68 ±0.08	41.17
-030	AS568-030	1-5/8	—	1.614 ±.013	0.066 ±.003	1.746	41.00 ±0.33	1.68 ±0.08	44.35
-031	AS568-031	1-3/4	—	1.739 ±.015	0.066 ±.003	1.871	44.17 ±0.38	1.68 ±0.08	47.52
-032	AS568-032	1-7/8	—	1.864 ±.015	0.066 ±.003	1.996	47.35 ±0.38	1.68 ±0.08	50.70
-033	AS568-033	2	—	1.989 ±.018	0.066 ±.003	2.121	50.52 ±0.46	1.68 ±0.08	53.87
-034	AS568-034	2-1/8	—	2.114 ±.018	0.066 ±.003	2.246	53.70 ±0.46	1.68 ±0.08	57.05
-035	AS568-035	2-1/4	—	2.239 ±.018	0.066 ±.003	2.371	56.87 ±0.46	1.68 ±0.08	60.22
-036	AS568-036	2-3/8	—	2.364 ±.018	0.066 ±.003	2.496	60.05 ±0.46	1.68 ±0.08	63.40
-037	AS568-037	2-1/2	—	2.489 ±.018	0.066 ±.003	2.621	63.22 ±0.46	1.68 ±0.08	66.57
-038	AS568-038	2-5/8	—	2.614 ±.020	0.066 ±.003	2.746	66.40 ±0.51	1.68 ±0.08	69.75
-039	AS568-039	2-3/4	—	2.739 ±.020	0.066 ±.003	2.871	69.57 ±0.51	1.68 ±0.08	72.92
-040	AS568-040	2-7/8	—	2.864 ±.020	0.066 ±.003	2.996	72.75 ±0.51	1.68 ±0.08	76.10
-041	AS568-041	3	—	2.989 ±.024	0.066 ±.003	3.121	75.92 ±0.61	1.68 ±0.08	79.27
-042	AS568-042	3-1/4	—	3.239 ±.024	0.066 ±.003	3.371	82.27 ±0.61	1.68 ±0.08	85.62
-043	AS568-043	3-1/2	—	3.489 ±.024	0.066 ±.003	3.621	88.62 ±0.61	1.68 ±0.08	91.97
-044	AS568-044	3-3/4	—	3.739 ±.027	0.066 ±.003	3.871	94.97 ±0.69	1.68 ±0.08	98.32
-045	AS568-045	4	—	3.989 ±.027	0.066 ±.003	4.121	101.32 ±0.69	1.68 ±0.08	104.67
-046	AS568-046	4-1/4	—	4.239 ±.030	0.066 ±.003	4.371	107.67 ±0.76	1.68 ±0.08	111.02
-047	AS568-047	4-1/2	—	4.489 ±.030	0.066 ±.003	4.621	114.02 ±0.76	1.68 ±0.08	117.37
-048	AS568-048	4-3/4	—	4.739 ±.030	0.066 ±.003	4.871	120.37 ±0.76	1.68 ±0.08	123.72
-049	AS568-049	5	—	4.989 ±.037	0.066 ±.003	5.121	126.72 ±0.94	1.68 ±0.08	130.07
-050	AS568-050	5-1/4	—	5.239 ±.037	0.066 ±.003	5.371	133.07 ±0.94	1.68 ±0.08	136.42

1xx series

77 sizes

Square Ring 1xx series size table
Dash	Code	Nom ID	Nom CS	ID (in)	CS (in)	OD (in)	ID (mm)	CS (mm)	OD (mm)
-102	AS568-102	1/16	—	0.049 ±.005	0.099 ±.003	0.247	1.24 ±0.13	2.51 ±0.08	6.27
-103	AS568-103	3/32	—	0.081 ±.005	0.099 ±.003	0.279	2.06 ±0.13	2.51 ±0.08	7.09
-104	AS568-104	1/8	—	0.112 ±.005	0.099 ±.003	0.310	2.84 ±0.13	2.51 ±0.08	7.87
-105	AS568-105	5/32	—	0.143 ±.005	0.099 ±.003	0.341	3.63 ±0.13	2.51 ±0.08	8.66
-106	AS568-106	3/16	—	0.174 ±.005	0.099 ±.003	0.372	4.42 ±0.13	2.51 ±0.08	9.45
-107	AS568-107	7/32	—	0.206 ±.005	0.099 ±.003	0.404	5.23 ±0.13	2.51 ±0.08	10.26
-108	AS568-108	1/4	—	0.237 ±.005	0.099 ±.003	0.435	6.02 ±0.13	2.51 ±0.08	11.05
-109	AS568-109	5/16	—	0.299 ±.005	0.099 ±.003	0.497	7.59 ±0.13	2.51 ±0.08	12.62
-110	AS568-110	3/8	—	0.362 ±.005	0.099 ±.003	0.560	9.19 ±0.13	2.51 ±0.08	14.22
-111	AS568-111	7/16	—	0.424 ±.005	0.099 ±.003	0.622	10.77 ±0.13	2.51 ±0.08	15.80
-112	AS568-112	1/2	—	0.487 ±.005	0.099 ±.003	0.685	12.37 ±0.13	2.51 ±0.08	17.40
-113	AS568-113	9/16	—	0.549 ±.007	0.099 ±.003	0.747	13.94 ±0.18	2.51 ±0.08	18.97
-114	AS568-114	5/8	—	0.612 ±.009	0.099 ±.003	0.810	15.54 ±0.23	2.51 ±0.08	20.57
-115	AS568-115	11/16	—	0.674 ±.009	0.099 ±.003	0.872	17.12 ±0.23	2.51 ±0.08	22.15
-116	AS568-116	3/4	—	0.737 ±.009	0.099 ±.003	0.935	18.72 ±0.23	2.51 ±0.08	23.75
-117	AS568-117	13/16	—	0.799 ±.010	0.099 ±.003	0.997	20.30 ±0.25	2.51 ±0.08	25.33
-118	AS568-118	7/8	—	0.862 ±.010	0.099 ±.003	1.060	21.89 ±0.25	2.51 ±0.08	26.92
-119	AS568-119	15/16	—	0.924 ±.010	0.099 ±.003	1.122	23.47 ±0.25	2.51 ±0.08	28.50
-120	AS568-120	1	—	0.987 ±.010	0.099 ±.003	1.185	25.07 ±0.25	2.51 ±0.08	30.10
-121	AS568-121	1-1/16	—	1.049 ±.010	0.099 ±.003	1.247	26.64 ±0.25	2.51 ±0.08	31.67
-122	AS568-122	1-1/8	—	1.112 ±.010	0.099 ±.003	1.310	28.24 ±0.25	2.51 ±0.08	33.27
-123	AS568-123	1-3/16	—	1.174 ±.012	0.099 ±.003	1.372	29.82 ±0.30	2.51 ±0.08	34.85
-124	AS568-124	1-1/4	—	1.237 ±.012	0.099 ±.003	1.435	31.42 ±0.30	2.51 ±0.08	36.45
-125	AS568-125	1-5/16	—	1.299 ±.012	0.099 ±.003	1.497	32.99 ±0.30	2.51 ±0.08	38.02
-126	AS568-126	1-3/8	—	1.362 ±.012	0.099 ±.003	1.560	34.59 ±0.30	2.51 ±0.08	39.62
-127	AS568-127	1-7/16	—	1.424 ±.012	0.099 ±.003	1.622	36.17 ±0.30	2.51 ±0.08	41.20
-128	AS568-128	1-1/2	—	1.487 ±.012	0.099 ±.003	1.685	37.77 ±0.30	2.51 ±0.08	42.80
-129	AS568-129	1-9/16	—	1.549 ±.015	0.099 ±.003	1.747	39.34 ±0.38	2.51 ±0.08	44.37
-130	AS568-130	1-5/8	—	1.612 ±.015	0.099 ±.003	1.810	40.94 ±0.38	2.51 ±0.08	45.97
-131	AS568-131	1-11/16	—	1.674 ±.015	0.099 ±.003	1.872	42.52 ±0.38	2.51 ±0.08	47.55
-132	AS568-132	1-3/4	—	1.737 ±.015	0.099 ±.003	1.935	44.12 ±0.38	2.51 ±0.08	49.15
-133	AS568-133	1-13/16	—	1.799 ±.015	0.099 ±.003	1.997	45.69 ±0.38	2.51 ±0.08	50.72
-134	AS568-134	1-7/8	—	1.862 ±.015	0.099 ±.003	2.060	47.30 ±0.38	2.51 ±0.08	52.33
-135	AS568-135	1-15/16	—	1.925 ±.017	0.099 ±.003	2.123	48.90 ±0.43	2.51 ±0.08	53.93
-136	AS568-136	2	—	1.987 ±.017	0.099 ±.003	2.185	50.47 ±0.43	2.51 ±0.08	55.50
-137	AS568-137	2-1/16	—	2.050 ±.017	0.099 ±.003	2.248	52.07 ±0.43	2.51 ±0.08	57.10
-138	AS568-138	2-1/8	—	2.112 ±.017	0.099 ±.003	2.310	53.64 ±0.43	2.51 ±0.08	58.67
-139	AS568-139	2-3/16	—	2.175 ±.017	0.099 ±.003	2.373	55.25 ±0.43	2.51 ±0.08	60.28
-140	AS568-140	2-1/4	—	2.237 ±.017	0.099 ±.003	2.435	56.82 ±0.43	2.51 ±0.08	61.85
-141	AS568-141	2-5/16	—	2.300 ±.020	0.099 ±.003	2.498	58.42 ±0.51	2.51 ±0.08	63.45
-142	AS568-142	2-3/8	—	2.362 ±.020	0.099 ±.003	2.560	59.99 ±0.51	2.51 ±0.08	65.02
-143	AS568-143	2-7/16	—	2.425 ±.020	0.099 ±.003	2.623	61.60 ±0.51	2.51 ±0.08	66.63
-144	AS568-144	2-1/2	—	2.487 ±.020	0.099 ±.003	2.685	63.17 ±0.51	2.51 ±0.08	68.20
-145	AS568-145	2-9/16	—	2.550 ±.020	0.099 ±.003	2.748	64.77 ±0.51	2.51 ±0.08	69.80
-146	AS568-146	2-5/8	—	2.612 ±.020	0.099 ±.003	2.810	66.34 ±0.51	2.51 ±0.08	71.37
-147	AS568-147	2-11/16	—	2.675 ±.022	0.099 ±.003	2.873	67.95 ±0.56	2.51 ±0.08	72.98
-148	AS568-148	2-3/4	—	2.737 ±.022	0.099 ±.003	2.935	69.52 ±0.56	2.51 ±0.08	74.55
-149	AS568-149	2-13/16	—	2.800 ±.022	0.099 ±.003	2.998	71.12 ±0.56	2.51 ±0.08	76.15
-150	AS568-150	2-7/8	—	2.862 ±.022	0.099 ±.003	3.060	72.69 ±0.56	2.51 ±0.08	77.72
-151	AS568-151	3	—	2.987 ±.024	0.099 ±.003	3.185	75.87 ±0.61	2.51 ±0.08	80.90
-152	AS568-152	3-1/4	—	3.237 ±.024	0.099 ±.003	3.435	82.22 ±0.61	2.51 ±0.08	87.25
-153	AS568-153	3-1/2	—	3.487 ±.024	0.099 ±.003	3.685	88.57 ±0.61	2.51 ±0.08	93.60
-154	AS568-154	3-3/4	—	3.737 ±.028	0.099 ±.003	3.935	94.92 ±0.71	2.51 ±0.08	99.95
-155	AS568-155	4	—	3.987 ±.028	0.099 ±.003	4.185	101.27 ±0.71	2.51 ±0.08	106.30
-156	AS568-156	4-1/4	—	4.237 ±.030	0.099 ±.003	4.435	107.62 ±0.76	2.51 ±0.08	112.65
-157	AS568-157	4-1/2	—	4.487 ±.030	0.099 ±.003	4.685	113.97 ±0.76	2.51 ±0.08	119.00
-158	AS568-158	4-3/4	—	4.737 ±.030	0.099 ±.003	4.935	120.32 ±0.76	2.51 ±0.08	125.35
-159	AS568-159	5	—	4.987 ±.035	0.099 ±.003	5.185	126.67 ±0.89	2.51 ±0.08	131.70
-160	AS568-160	5-1/4	—	5.237 ±.035	0.099 ±.003	5.435	133.02 ±0.89	2.51 ±0.08	138.05
-161	AS568-161	5-1/2	—	5.487 ±.035	0.099 ±.003	5.685	139.37 ±0.89	2.51 ±0.08	144.40
-162	AS568-162	5-3/4	—	5.737 ±.035	0.099 ±.003	5.935	145.72 ±0.89	2.51 ±0.08	150.75
-163	AS568-163	6	—	5.987 ±.035	0.099 ±.003	6.185	152.07 ±0.89	2.51 ±0.08	157.10
-164	AS568-164	6-1/4	—	6.237 ±.040	0.099 ±.003	6.435	158.42 ±1.02	2.51 ±0.08	163.45
-165	AS568-165	6-1/2	—	6.487 ±.040	0.099 ±.003	6.685	164.77 ±1.02	2.51 ±0.08	169.80
-166	AS568-166	6-3/4	—	6.737 ±.040	0.099 ±.003	6.935	171.12 ±1.02	2.51 ±0.08	176.15
-167	AS568-167	7	—	6.987 ±.040	0.099 ±.003	7.185	177.47 ±1.02	2.51 ±0.08	182.50
-168	AS568-168	7-1/4	—	7.237 ±.045	0.099 ±.003	7.435	183.82 ±1.14	2.51 ±0.08	188.85
-169	AS568-169	7-1/2	—	7.487 ±.045	0.099 ±.003	7.685	190.17 ±1.14	2.51 ±0.08	195.20
-170	AS568-170	7-3/4	—	7.737 ±.045	0.099 ±.003	7.935	196.52 ±1.14	2.51 ±0.08	201.55
-171	AS568-171	8	—	7.987 ±.045	0.099 ±.003	8.185	202.87 ±1.14	2.51 ±0.08	207.90
-172	AS568-172	8-1/4	—	8.237 ±.050	0.099 ±.003	8.435	209.22 ±1.27	2.51 ±0.08	214.25
-173	AS568-173	8-1/2	—	8.487 ±.050	0.099 ±.003	8.685	215.57 ±1.27	2.51 ±0.08	220.60
-174	AS568-174	8-3/4	—	8.737 ±.050	0.099 ±.003	8.935	221.92 ±1.27	2.51 ±0.08	226.95
-175	AS568-175	9	—	8.987 ±.050	0.099 ±.003	9.185	228.27 ±1.27	2.51 ±0.08	233.30
-176	AS568-176	9-1/4	—	9.237 ±.055	0.099 ±.003	9.435	234.62 ±1.40	2.51 ±0.08	239.65
-177	AS568-177	9-1/2	—	9.487 ±.055	0.099 ±.003	9.685	240.97 ±1.40	2.51 ±0.08	246.00
-178	AS568-178	9-3/4	—	9.737 ±.055	0.099 ±.003	9.935	247.32 ±1.40	2.51 ±0.08	252.35

2xx series

84 sizes

Square Ring 2xx series size table
Dash	Code	Nom ID	Nom CS	ID (in)	CS (in)	OD (in)	ID (mm)	CS (mm)	OD (mm)
-201	AS568-201	3/16	—	0.171 ±.005	0.134 ±.004	0.439	4.34 ±0.13	3.40 ±0.10	11.15
-202	AS568-202	1/4	—	0.234 ±.005	0.134 ±.004	0.502	5.94 ±0.13	3.40 ±0.10	12.75
-203	AS568-203	5/16	—	0.296 ±.005	0.134 ±.004	0.564	7.52 ±0.13	3.40 ±0.10	14.33
-204	AS568-204	3/8	—	0.359 ±.005	0.134 ±.004	0.627	9.12 ±0.13	3.40 ±0.10	15.93
-205	AS568-205	7/16	—	0.421 ±.005	0.134 ±.004	0.689	10.69 ±0.13	3.40 ±0.10	17.50
-206	AS568-206	1/2	—	0.484 ±.005	0.134 ±.004	0.752	12.29 ±0.13	3.40 ±0.10	19.10
-207	AS568-207	9/16	—	0.546 ±.007	0.134 ±.004	0.814	13.87 ±0.17	3.40 ±0.10	20.68
-208	AS568-208	5/8	—	0.609 ±.009	0.134 ±.004	0.877	15.47 ±0.23	3.40 ±0.10	22.28
-209	AS568-209	11/16	—	0.671 ±.009	0.134 ±.004	0.939	17.04 ±0.23	3.40 ±0.10	23.85
-210	AS568-210	3/4	—	0.734 ±.010	0.134 ±.004	1.002	18.64 ±0.25	3.40 ±0.10	25.45
-211	AS568-211	13/16	—	0.796 ±.010	0.134 ±.004	1.064	20.22 ±0.25	3.40 ±0.10	27.03
-212	AS568-212	7/8	—	0.859 ±.010	0.134 ±.004	1.127	21.82 ±0.25	3.40 ±0.10	28.63
-213	AS568-213	15/16	—	0.921 ±.010	0.134 ±.004	1.189	23.39 ±0.25	3.40 ±0.10	30.20
-214	AS568-214	1	—	0.984 ±.010	0.134 ±.004	1.252	25.00 ±0.25	3.40 ±0.10	31.81
-215	AS568-215	1-1/16	—	1.046 ±.010	0.134 ±.004	1.314	26.57 ±0.25	3.40 ±0.10	33.38
-216	AS568-216	1-1/8	—	1.109 ±.012	0.134 ±.004	1.377	28.17 ±0.30	3.40 ±0.10	34.98
-217	AS568-217	1-3/16	—	1.171 ±.012	0.134 ±.004	1.439	29.74 ±0.30	3.40 ±0.10	36.55
-218	AS568-218	1-1/4	—	1.234 ±.012	0.134 ±.004	1.502	31.34 ±0.30	3.40 ±0.10	38.15
-219	AS568-219	1-5/16	—	1.296 ±.012	0.134 ±.004	1.564	32.92 ±0.30	3.40 ±0.10	39.73
-220	AS568-220	1-3/8	—	1.359 ±.012	0.134 ±.004	1.627	34.52 ±0.30	3.40 ±0.10	41.33
-221	AS568-221	1-7/16	—	1.421 ±.012	0.134 ±.004	1.689	36.09 ±0.30	3.40 ±0.10	42.90
-222	AS568-222	1-1/2	—	1.484 ±.015	0.134 ±.004	1.752	37.69 ±0.38	3.40 ±0.10	44.50
-223	AS568-223	1-5/8	—	1.609 ±.015	0.134 ±.004	1.877	40.87 ±0.38	3.40 ±0.10	47.68
-224	AS568-224	1-3/4	—	1.734 ±.015	0.134 ±.004	2.002	44.04 ±0.38	3.40 ±0.10	50.85
-225	AS568-225	1-7/8	—	1.859 ±.018	0.134 ±.004	2.127	47.22 ±0.46	3.40 ±0.10	54.03
-226	AS568-226	2	—	1.984 ±.018	0.134 ±.004	2.252	50.39 ±0.46	3.40 ±0.10	57.20
-227	AS568-227	2-1/8	—	2.109 ±.018	0.134 ±.004	2.377	53.57 ±0.46	3.40 ±0.10	60.38
-228	AS568-228	2-1/4	—	2.234 ±.020	0.134 ±.004	2.502	56.74 ±0.50	3.40 ±0.10	63.55
-229	AS568-229	2-3/8	—	2.359 ±.020	0.134 ±.004	2.627	59.92 ±0.50	3.40 ±0.10	66.73
-230	AS568-230	2-1/2	—	2.484 ±.020	0.134 ±.004	2.752	63.09 ±0.50	3.40 ±0.10	69.90
-231	AS568-231	2-5/8	—	2.609 ±.020	0.134 ±.004	2.877	66.27 ±0.50	3.40 ±0.10	73.08
-232	AS568-232	2-3/4	—	2.734 ±.024	0.134 ±.004	3.002	69.44 ±0.61	3.40 ±0.10	76.25
-233	AS568-233	2-7/8	—	2.859 ±.024	0.134 ±.004	3.127	72.62 ±0.61	3.40 ±0.10	79.43
-234	AS568-234	3	—	2.984 ±.024	0.134 ±.004	3.252	75.79 ±0.61	3.40 ±0.10	82.60
-235	AS568-235	3-1/8	—	3.109 ±.024	0.134 ±.004	3.377	78.97 ±0.61	3.40 ±0.10	85.78
-236	AS568-236	3-1/4	—	3.234 ±.024	0.134 ±.004	3.502	82.14 ±0.61	3.40 ±0.10	88.95
-237	AS568-237	3-3/8	—	3.359 ±.024	0.134 ±.004	3.627	85.32 ±0.61	3.40 ±0.10	92.13
-238	AS568-238	3-1/2	—	3.484 ±.024	0.134 ±.004	3.752	88.49 ±0.61	3.40 ±0.10	95.30
-239	AS568-239	3-5/8	—	3.609 ±.028	0.134 ±.004	3.877	91.67 ±0.71	3.40 ±0.10	98.48
-240	AS568-240	3-3/4	—	3.734 ±.028	0.134 ±.004	4.002	94.84 ±0.71	3.40 ±0.10	101.65
-241	AS568-241	3-7/8	—	3.859 ±.028	0.134 ±.004	4.127	98.02 ±0.71	3.40 ±0.10	104.83
-242	AS568-242	4	—	3.984 ±.028	0.134 ±.004	4.252	101.19 ±0.71	3.40 ±0.10	108.00
-243	AS568-243	4-1/8	—	4.109 ±.028	0.134 ±.004	4.377	104.37 ±0.71	3.40 ±0.10	111.18
-244	AS568-244	4-1/4	—	4.234 ±.030	0.134 ±.004	4.502	107.54 ±0.76	3.40 ±0.10	114.35
-245	AS568-245	4-3/8	—	4.359 ±.030	0.134 ±.004	4.627	110.72 ±0.76	3.40 ±0.10	117.53
-246	AS568-246	4-1/2	—	4.484 ±.030	0.134 ±.004	4.752	113.89 ±0.76	3.40 ±0.10	120.70
-247	AS568-247	4-5/8	—	4.609 ±.030	0.134 ±.004	4.877	117.07 ±0.76	3.40 ±0.10	123.88
-248	AS568-248	4-3/4	—	4.734 ±.030	0.134 ±.004	5.002	120.24 ±0.76	3.40 ±0.10	127.05
-249	AS568-249	4-7/8	—	4.859 ±.035	0.134 ±.004	5.127	123.42 ±0.89	3.40 ±0.10	130.23
-250	AS568-250	5	—	4.984 ±.035	0.134 ±.004	5.252	126.59 ±0.89	3.40 ±0.10	133.40
-251	AS568-251	5-1/8	—	5.109 ±.035	0.134 ±.004	5.377	129.77 ±0.89	3.40 ±0.10	136.58
-252	AS568-252	5-1/4	—	5.234 ±.035	0.134 ±.004	5.502	132.94 ±0.89	3.40 ±0.10	139.75
-253	AS568-253	5-3/8	—	5.359 ±.035	0.134 ±.004	5.627	136.12 ±0.89	3.40 ±0.10	142.93
-254	AS568-254	5-1/2	—	5.484 ±.035	0.134 ±.004	5.752	139.29 ±0.89	3.40 ±0.10	146.10
-255	AS568-255	5-5/8	—	5.609 ±.035	0.134 ±.004	5.877	142.47 ±0.89	3.40 ±0.10	149.28
-256	AS568-256	5-3/4	—	5.734 ±.035	0.134 ±.004	6.002	145.65 ±0.89	3.40 ±0.10	152.46
-257	AS568-257	5-7/8	—	5.859 ±.035	0.134 ±.004	6.127	148.82 ±0.89	3.40 ±0.10	155.63
-258	AS568-258	6	—	5.984 ±.035	0.134 ±.004	6.252	151.99 ±0.89	3.40 ±0.10	158.80
-259	AS568-259	6-1/4	—	6.234 ±.040	0.134 ±.004	6.502	158.34 ±1.02	3.40 ±0.10	165.15
-260	AS568-260	6-1/2	—	6.484 ±.040	0.134 ±.004	6.752	164.69 ±1.02	3.40 ±0.10	171.50
-261	AS568-261	6-3/4	—	6.734 ±.040	0.134 ±.004	7.002	171.04 ±1.02	3.40 ±0.10	177.85
-262	AS568-262	7	—	6.984 ±.040	0.134 ±.004	7.252	177.39 ±1.02	3.40 ±0.10	184.20
-263	AS568-263	7-1/4	—	7.234 ±.045	0.134 ±.004	7.502	183.74 ±1.14	3.40 ±0.10	190.55
-264	AS568-264	7-1/2	—	7.484 ±.045	0.134 ±.004	7.752	190.09 ±1.14	3.40 ±0.10	196.90
-265	AS568-265	7-3/4	—	7.734 ±.045	0.134 ±.004	8.002	196.44 ±1.14	3.40 ±0.10	203.25
-266	AS568-266	8	—	7.984 ±.045	0.134 ±.004	8.252	202.79 ±1.14	3.40 ±0.10	209.60
-267	AS568-267	8-1/4	—	8.234 ±.050	0.134 ±.004	8.502	209.14 ±1.27	3.40 ±0.10	215.95
-268	AS568-268	8-1/2	—	8.484 ±.050	0.134 ±.004	8.752	215.49 ±1.27	3.40 ±0.10	222.30
-269	AS568-269	8-3/4	—	8.734 ±.050	0.134 ±.004	9.002	221.84 ±1.27	3.40 ±0.10	228.65
-270	AS568-270	9	—	8.984 ±.050	0.134 ±.004	9.252	228.19 ±1.27	3.40 ±0.10	235.00
-271	AS568-271	9-1/4	—	9.234 ±.055	0.134 ±.004	9.502	234.54 ±1.40	3.40 ±0.10	241.35
-272	AS568-272	9-1/2	—	9.484 ±.055	0.134 ±.004	9.752	240.89 ±1.40	3.40 ±0.10	247.70
-273	AS568-273	9-3/4	—	9.734 ±.055	0.134 ±.004	10.002	247.24 ±1.40	3.40 ±0.10	254.05
-274	AS568-274	10	—	9.984 ±.055	0.134 ±.004	10.252	253.59 ±1.40	3.40 ±0.10	260.40
-275	AS568-275	10-1/2	—	10.484 ±.065	0.134 ±.004	10.752	266.29 ±1.40	3.40 ±0.10	273.10
-276	AS568-276	11	—	10.984 ±.065	0.134 ±.004	11.252	278.99 ±1.65	3.40 ±0.10	285.80
-277	AS568-277	11-1/2	—	11.484 ±.065	0.134 ±.004	11.752	291.69 ±1.65	3.40 ±0.10	298.50
-278	AS568-278	12	—	11.984 ±.065	0.134 ±.004	12.252	304.39 ±1.65	3.40 ±0.10	311.20
-279	AS568-279	13	—	12.984 ±.065	0.134 ±.004	13.252	329.79 ±1.65	3.40 ±0.10	336.60
-280	AS568-280	14	—	13.984 ±.065	0.134 ±.004	14.252	355.19 ±1.65	3.40 ±0.10	362.00
-281	AS568-281	15	—	14.984 ±.065	0.134 ±.004	15.252	380.59 ±1.65	3.40 ±0.10	387.40
-282	AS568-282	16	—	15.955 ±.075	0.134 ±.004	16.223	405.26 ±1.91	3.40 ±0.10	412.07
-283	AS568-283	17	—	16.955 ±.080	0.134 ±.004	17.223	430.66 ±2.03	3.40 ±0.10	437.47
-284	AS568-284	18	—	17.955 ±.085	0.134 ±.004	18.223	456.06 ±2.16	3.40 ±0.10	462.87

3xx series

87 sizes

Square Ring 3xx series size table
Dash	Code	Nom ID	Nom CS	ID (in)	CS (in)	OD (in)	ID (mm)	CS (mm)	OD (mm)
-309	AS568-309	7/16	—	0.412 ±.005	0.203 ±.005	0.818	10.46 ±0.13	5.16 ±0.13	20.77
-310	AS568-310	1/2	—	0.475 ±.005	0.203 ±.005	0.881	12.07 ±0.13	5.16 ±0.13	22.38
-311	AS568-311	9/16	—	0.537 ±.007	0.203 ±.005	0.943	13.64 ±0.18	5.16 ±0.13	23.95
-312	AS568-312	5/8	—	0.600 ±.009	0.203 ±.005	1.006	15.24 ±0.23	5.16 ±0.13	25.55
-313	AS568-313	11/16	—	0.662 ±.009	0.203 ±.005	1.068	16.81 ±0.23	5.16 ±0.13	27.12
-314	AS568-314	3/4	—	0.725 ±.010	0.203 ±.005	1.131	18.42 ±0.25	5.16 ±0.13	28.73
-315	AS568-315	13/16	—	0.787 ±.010	0.203 ±.005	1.193	19.99 ±0.25	5.16 ±0.13	30.30
-316	AS568-316	7/8	—	0.850 ±.010	0.203 ±.005	1.256	21.59 ±0.25	5.16 ±0.13	31.90
-317	AS568-317	15/16	—	0.912 ±.010	0.203 ±.005	1.318	23.16 ±0.25	5.16 ±0.13	33.47
-318	AS568-318	1	—	0.975 ±.010	0.203 ±.005	1.381	24.77 ±0.25	5.16 ±0.13	35.08
-319	AS568-319	1-1/16	—	1.037 ±.010	0.203 ±.005	1.443	26.34 ±0.25	5.16 ±0.13	36.65
-320	AS568-320	1-1/8	—	1.100 ±.012	0.203 ±.005	1.506	27.94 ±0.30	5.16 ±0.13	38.25
-321	AS568-321	1-3/16	—	1.162 ±.012	0.203 ±.005	1.568	29.51 ±0.30	5.16 ±0.13	39.82
-322	AS568-322	1-1/4	—	1.225 ±.012	0.203 ±.005	1.631	31.12 ±0.30	5.16 ±0.13	41.43
-323	AS568-323	1-5/16	—	1.287 ±.012	0.203 ±.005	1.693	32.69 ±0.30	5.16 ±0.13	43.00
-324	AS568-324	1-3/8	—	1.350 ±.012	0.203 ±.005	1.756	34.29 ±0.30	5.16 ±0.13	44.60
-325	AS568-325	1-1/2	—	1.475 ±.015	0.203 ±.005	1.881	37.47 ±0.38	5.16 ±0.13	47.78
-326	AS568-326	1-5/8	—	1.600 ±.015	0.203 ±.005	2.006	40.64 ±0.38	5.16 ±0.13	50.95
-327	AS568-327	1-3/4	—	1.725 ±.015	0.203 ±.005	2.131	43.82 ±0.38	5.16 ±0.13	54.13
-328	AS568-328	1-7/8	—	1.850 ±.015	0.203 ±.005	2.256	46.99 ±0.38	5.16 ±0.13	57.30
-329	AS568-329	2	—	1.975 ±.018	0.203 ±.005	2.381	50.17 ±0.46	5.16 ±0.13	60.48
-330	AS568-330	2-1/8	—	2.100 ±.018	0.203 ±.005	2.506	53.34 ±0.46	5.16 ±0.13	63.65
-331	AS568-331	2-1/4	—	2.225 ±.018	0.203 ±.005	2.631	56.52 ±0.46	5.16 ±0.13	66.83
-332	AS568-332	2-3/8	—	2.350 ±.018	0.203 ±.005	2.756	59.69 ±0.46	5.16 ±0.13	70.00
-333	AS568-333	2-1/2	—	2.475 ±.020	0.203 ±.005	2.881	62.87 ±0.51	5.16 ±0.13	73.18
-334	AS568-334	2-5/8	—	2.600 ±.020	0.203 ±.005	3.006	66.04 ±0.51	5.16 ±0.13	76.35
-335	AS568-335	2-3/4	—	2.725 ±.020	0.203 ±.005	3.131	69.22 ±0.51	5.16 ±0.13	79.53
-336	AS568-336	2-7/8	—	2.850 ±.020	0.203 ±.005	3.256	72.39 ±0.51	5.16 ±0.13	82.70
-337	AS568-337	3	—	2.975 ±.024	0.203 ±.005	3.381	75.57 ±0.61	5.16 ±0.13	85.88
-338	AS568-338	3-1/8	—	3.100 ±.024	0.203 ±.005	3.506	78.74 ±0.61	5.16 ±0.13	89.05
-339	AS568-339	3-1/4	—	3.225 ±.024	0.203 ±.005	3.631	81.92 ±0.61	5.16 ±0.13	92.23
-340	AS568-340	3-3/8	—	3.350 ±.024	0.203 ±.005	3.756	85.09 ±0.61	5.16 ±0.13	95.40
-341	AS568-341	3-1/2	—	3.475 ±.024	0.203 ±.005	3.881	88.27 ±0.61	5.16 ±0.13	98.58
-342	AS568-342	3-5/8	—	3.600 ±.028	0.203 ±.005	4.006	91.44 ±0.71	5.16 ±0.13	101.75
-343	AS568-343	3-3/4	—	3.725 ±.028	0.203 ±.005	4.131	94.62 ±0.71	5.16 ±0.13	104.93
-344	AS568-344	3-7/8	—	3.850 ±.028	0.203 ±.005	4.256	97.79 ±0.71	5.16 ±0.13	108.10
-345	AS568-345	4	—	3.975 ±.028	0.203 ±.005	4.381	100.97 ±0.71	5.16 ±0.13	111.28
-346	AS568-346	4-1/8	—	4.100 ±.028	0.203 ±.005	4.506	104.14 ±0.71	5.16 ±0.13	114.45
-347	AS568-347	4-1/4	—	4.225 ±.030	0.203 ±.005	4.631	107.32 ±0.76	5.16 ±0.13	117.63
-348	AS568-348	4-3/8	—	4.350 ±.030	0.203 ±.005	4.756	110.49 ±0.76	5.16 ±0.13	120.80
-349	AS568-349	4-1/2	—	4.475 ±.030	0.203 ±.005	4.881	113.67 ±0.76	5.16 ±0.13	123.98
-350	AS568-350	4-5/8	—	4.600 ±.030	0.203 ±.005	5.006	116.84 ±0.76	5.16 ±0.13	127.15
-351	AS568-351	4-3/4	—	4.725 ±.030	0.203 ±.005	5.131	120.02 ±0.76	5.16 ±0.13	130.33
-352	AS568-352	4-7/8	—	4.850 ±.030	0.203 ±.005	5.256	123.19 ±0.76	5.16 ±0.13	133.50
-353	AS568-353	5	—	4.975 ±.037	0.203 ±.005	5.381	126.37 ±0.94	5.16 ±0.13	136.68
-354	AS568-354	5-1/8	—	5.100 ±.037	0.203 ±.005	5.506	129.54 ±0.94	5.16 ±0.13	139.85
-355	AS568-355	5-1/4	—	5.225 ±.037	0.203 ±.005	5.631	132.72 ±0.94	5.16 ±0.13	143.03
-356	AS568-356	5-3/8	—	5.350 ±.037	0.203 ±.005	5.756	135.89 ±0.94	5.16 ±0.13	146.20
-357	AS568-357	5-1/2	—	5.475 ±.037	0.203 ±.005	5.881	139.07 ±0.94	5.16 ±0.13	149.38
-358	AS568-358	5-5/8	—	5.600 ±.037	0.203 ±.005	6.006	142.24 ±0.94	5.16 ±0.13	152.55
-359	AS568-359	5-3/4	—	5.725 ±.037	0.203 ±.005	6.131	145.42 ±0.94	5.16 ±0.13	155.73
-360	AS568-360	5-7/8	—	5.850 ±.037	0.203 ±.005	6.256	148.59 ±0.94	5.16 ±0.13	158.90
-361	AS568-361	6	—	5.975 ±.037	0.203 ±.005	6.381	151.77 ±0.94	5.16 ±0.13	162.08
-362	AS568-362	6-1/4	—	6.225 ±.040	0.203 ±.005	6.631	158.12 ±1.02	5.16 ±0.13	168.43
-363	AS568-363	6-1/2	—	6.475 ±.040	0.203 ±.005	6.881	164.47 ±1.02	5.16 ±0.13	174.78
-364	AS568-364	6-3/4	—	6.725 ±.040	0.203 ±.005	7.131	170.82 ±1.02	5.16 ±0.13	181.13
-365	AS568-365	7	—	6.975 ±.040	0.203 ±.005	7.381	177.17 ±1.02	5.16 ±0.13	187.48
-366	AS568-366	7-1/4	—	7.225 ±.045	0.203 ±.005	7.631	183.52 ±1.14	5.16 ±0.13	193.83
-367	AS568-367	7-1/2	—	7.475 ±.045	0.203 ±.005	7.881	189.87 ±1.14	5.16 ±0.13	200.18
-368	AS568-368	7-3/4	—	7.725 ±.045	0.203 ±.005	8.131	196.22 ±1.14	5.16 ±0.13	206.53
-369	AS568-369	8	—	7.975 ±.045	0.203 ±.005	8.381	202.57 ±1.14	5.16 ±0.13	212.88
-370	AS568-370	8-1/4	—	8.225 ±.050	0.203 ±.005	8.631	208.92 ±1.27	5.16 ±0.13	219.23
-371	AS568-371	8-1/2	—	8.475 ±.050	0.203 ±.005	8.881	215.27 ±1.27	5.16 ±0.13	225.58
-372	AS568-372	8-3/4	—	8.725 ±.050	0.203 ±.005	9.131	221.62 ±1.27	5.16 ±0.13	231.93
-373	AS568-373	9	—	8.975 ±.050	0.203 ±.005	9.381	227.97 ±1.27	5.16 ±0.13	238.28
-374	AS568-374	9-1/4	—	9.225 ±.055	0.203 ±.005	9.631	234.32 ±1.40	5.16 ±0.13	244.63
-375	AS568-375	9-1/2	—	9.475 ±.055	0.203 ±.005	9.881	240.67 ±1.40	5.16 ±0.13	250.98
-376	AS568-376	9-3/4	—	9.725 ±.055	0.203 ±.005	10.131	247.02 ±1.40	5.16 ±0.13	257.33
-377	AS568-377	10	—	9.975 ±.055	0.203 ±.005	10.381	253.37 ±1.40	5.16 ±0.13	263.68
-378	AS568-378	10-1/2	—	10.475 ±.060	0.203 ±.005	10.881	266.07 ±1.52	5.16 ±0.13	276.38
-379	AS568-379	11	—	10.975 ±.060	0.203 ±.005	11.381	278.77 ±1.52	5.16 ±0.13	289.08
-380	AS568-380	11-1/2	—	11.475 ±.065	0.203 ±.005	11.881	291.47 ±1.65	5.16 ±0.13	301.78
-381	AS568-381	12	—	11.975 ±.065	0.203 ±.005	12.381	304.17 ±1.65	5.16 ±0.13	314.48
-382	AS568-382	13	—	12.975 ±.065	0.203 ±.005	13.381	329.57 ±1.65	5.16 ±0.13	339.88
-383	AS568-383	14	—	13.975 ±.070	0.203 ±.005	14.381	354.97 ±1.78	5.16 ±0.13	365.28
-384	AS568-384	15	—	14.975 ±.070	0.203 ±.005	15.381	380.37 ±1.78	5.16 ±0.13	390.68
-385	AS568-385	16	—	15.955 ±.075	0.203 ±.005	16.361	405.26 ±1.91	5.16 ±0.13	415.57
-386	AS568-386	17	—	16.955 ±.080	0.203 ±.005	17.361	430.66 ±2.03	5.16 ±0.13	440.97
-387	AS568-387	18	—	17.955 ±.085	0.203 ±.005	18.361	456.06 ±2.16	5.16 ±0.13	466.37
-388	AS568-388	19	—	18.955 ±.090	0.203 ±.005	19.361	481.41 ±2.29	5.16 ±0.13	491.72
-389	AS568-389	20	—	19.955 ±.095	0.203 ±.005	20.361	506.81 ±2.41	5.16 ±0.13	517.12
-390	AS568-390	21	—	20.955 ±.095	0.203 ±.005	21.361	532.21 ±2.41	5.16 ±0.13	542.52
-391	AS568-391	22	—	21.955 ±.100	0.203 ±.005	22.361	557.61 ±2.54	5.16 ±0.13	567.92
-392	AS568-392	23	—	22.940 ±.105	0.203 ±.005	23.346	582.68 ±2.67	5.16 ±0.13	592.99
-393	AS568-393	24	—	23.940 ±.110	0.203 ±.005	24.346	608.08 ±2.79	5.16 ±0.13	618.39
-394	AS568-394	25	—	24.940 ±.115	0.203 ±.005	25.346	633.48 ±2.92	5.16 ±0.13	643.79
-395	AS568-395	26	—	25.940 ±.120	0.203 ±.005	26.346	658.88 ±3.05	5.16 ±0.13	669.19

4xx series

76 sizes

Square Ring 4xx series size table
Dash	Code	Nom ID	Nom CS	ID (in)	CS (in)	OD (in)	ID (mm)	CS (mm)	OD (mm)
-400	AS568-400	—	—	1.350 ±.014	0.266 ±.006	1.882	34.29 ±0.35	6.76 ±0.15	47.80
-401	AS568-401	—	—	1.475 ±.014	0.266 ±.006	2.007	37.47 ±0.35	6.76 ±0.15	50.98
-402	AS568-402	—	—	1.600 ±.014	0.266 ±.006	2.132	40.64 ±0.35	6.76 ±0.15	54.15
-403	AS568-403	—	—	1.725 ±.014	0.266 ±.006	2.257	43.82 ±0.35	6.76 ±0.15	57.33
-404	AS568-404	—	—	1.850 ±.014	0.266 ±.006	2.382	46.99 ±0.35	6.76 ±0.15	60.50
-405	AS568-405	—	—	1.975 ±.016	0.266 ±.006	2.507	50.17 ±0.40	6.76 ±0.15	63.68
-406	AS568-406	—	—	2.100 ±.016	0.266 ±.006	2.632	53.34 ±0.40	6.76 ±0.15	66.85
-407	AS568-407	—	—	2.225 ±.016	0.266 ±.006	2.757	56.52 ±0.40	6.76 ±0.15	70.03
-408	AS568-408	—	—	2.350 ±.016	0.266 ±.006	2.882	59.69 ±0.40	6.76 ±0.15	73.20
-409	AS568-409	—	—	2.475 ±.016	0.266 ±.006	3.007	62.87 ±0.40	6.76 ±0.15	76.38
-410	AS568-410	—	—	2.600 ±.016	0.266 ±.006	3.132	66.04 ±0.40	6.76 ±0.15	79.55
-411	AS568-411	—	—	2.725 ±.016	0.266 ±.006	3.257	69.22 ±0.40	6.76 ±0.15	82.73
-412	AS568-412	—	—	2.850 ±.016	0.266 ±.006	3.382	72.39 ±0.40	6.76 ±0.15	85.90
-413	AS568-413	—	—	2.975 ±.016	0.266 ±.006	3.507	75.57 ±0.40	6.76 ±0.15	89.08
-414	AS568-414	—	—	3.100 ±.016	0.266 ±.006	3.632	78.74 ±0.40	6.76 ±0.15	92.25
-415	AS568-415	—	—	3.225 ±.020	0.266 ±.006	3.757	81.92 ±0.50	6.76 ±0.15	95.43
-416	AS568-416	—	—	3.350 ±.020	0.266 ±.006	3.882	85.09 ±0.50	6.76 ±0.15	98.60
-417	AS568-417	—	—	3.475 ±.020	0.266 ±.006	4.007	88.27 ±0.50	6.76 ±0.15	101.78
-418	AS568-418	—	—	3.600 ±.020	0.266 ±.006	4.132	91.44 ±0.50	6.76 ±0.15	104.95
-419	AS568-419	—	—	3.725 ±.020	0.266 ±.006	4.257	94.62 ±0.50	6.76 ±0.15	108.13
-420	AS568-420	—	—	3.850 ±.020	0.266 ±.006	4.382	97.79 ±0.50	6.76 ±0.15	111.30
-421	AS568-421	—	—	3.975 ±.020	0.266 ±.006	4.507	100.97 ±0.50	6.76 ±0.15	114.48
-422	AS568-422	—	—	4.100 ±.020	0.266 ±.006	4.632	104.14 ±0.50	6.76 ±0.15	117.65
-423	AS568-423	—	—	4.225 ±.020	0.266 ±.006	4.757	107.32 ±0.50	6.76 ±0.15	120.83
-424	AS568-424	—	—	4.350 ±.020	0.266 ±.006	4.882	110.49 ±0.50	6.76 ±0.15	124.00
-425	AS568-425	4-1/2	—	4.475 ±.033	0.266 ±.006	5.007	113.67 ±0.84	6.76 ±0.15	127.18
-426	AS568-426	4-5/8	—	4.600 ±.033	0.266 ±.006	5.132	116.84 ±0.84	6.76 ±0.15	130.35
-427	AS568-427	4-3/4	—	4.725 ±.033	0.266 ±.006	5.257	120.02 ±0.84	6.76 ±0.15	133.53
-428	AS568-428	4-7/8	—	4.850 ±.033	0.266 ±.006	5.382	123.19 ±0.84	6.76 ±0.15	136.70
-429	AS568-429	5	—	4.975 ±.037	0.266 ±.006	5.507	126.37 ±0.94	6.76 ±0.15	139.88
-430	AS568-430	5-1/8	—	5.100 ±.037	0.266 ±.006	5.632	129.54 ±0.94	6.76 ±0.15	143.05
-431	AS568-431	5-1/4	—	5.225 ±.037	0.266 ±.006	5.757	132.72 ±0.94	6.76 ±0.15	146.23
-432	AS568-432	5-3/8	—	5.350 ±.037	0.266 ±.006	5.882	135.89 ±0.94	6.76 ±0.15	149.40
-433	AS568-433	5-1/2	—	5.475 ±.037	0.266 ±.006	6.007	139.07 ±0.94	6.76 ±0.15	152.58
-434	AS568-434	5-5/8	—	5.600 ±.037	0.266 ±.006	6.132	142.24 ±0.94	6.76 ±0.15	155.75
-435	AS568-435	5-3/4	—	5.725 ±.037	0.266 ±.006	6.257	145.42 ±0.94	6.76 ±0.15	158.93
-436	AS568-436	5-7/8	—	5.850 ±.037	0.266 ±.006	6.382	148.59 ±0.94	6.76 ±0.15	162.10
-437	AS568-437	6	—	5.975 ±.037	0.266 ±.006	6.507	151.77 ±0.94	6.76 ±0.15	165.28
-438	AS568-438	6-1/4	—	6.225 ±.040	0.266 ±.006	6.757	158.12 ±1.02	6.76 ±0.15	171.63
-439	AS568-439	6-1/2	—	6.475 ±.040	0.266 ±.006	7.007	164.47 ±1.02	6.76 ±0.15	177.98
-440	AS568-440	6-3/4	—	6.725 ±.040	0.266 ±.006	7.257	170.82 ±1.02	6.76 ±0.15	184.33
-441	AS568-441	7	—	6.975 ±.040	0.266 ±.006	7.507	177.17 ±1.02	6.76 ±0.15	190.68
-442	AS568-442	7-1/4	—	7.225 ±.045	0.266 ±.006	7.757	183.52 ±1.14	6.76 ±0.15	197.03
-443	AS568-443	7-1/2	—	7.475 ±.045	0.266 ±.006	8.007	189.87 ±1.14	6.76 ±0.15	203.38
-444	AS568-444	7-3/4	—	7.725 ±.045	0.266 ±.006	8.257	196.22 ±1.14	6.76 ±0.15	209.73
-445	AS568-445	8	—	7.975 ±.045	0.266 ±.006	8.507	202.57 ±1.14	6.76 ±0.15	216.08
-446	AS568-446	8-1/2	—	8.475 ±.055	0.266 ±.006	9.007	215.27 ±1.40	6.76 ±0.15	228.78
-447	AS568-447	9	—	8.975 ±.055	0.266 ±.006	9.507	227.97 ±1.40	6.76 ±0.15	241.48
-448	AS568-448	9-1/2	—	9.475 ±.055	0.266 ±.006	10.007	240.67 ±1.40	6.76 ±0.15	254.18
-449	AS568-449	10	—	9.975 ±.055	0.266 ±.006	10.507	253.37 ±1.40	6.76 ±0.15	266.88
-450	AS568-450	10-1/2	—	10.475 ±.060	0.266 ±.006	11.007	266.07 ±1.52	6.76 ±0.15	279.58
-451	AS568-451	11	—	10.975 ±.060	0.266 ±.006	11.507	278.77 ±1.52	6.76 ±0.15	292.28
-452	AS568-452	11-1/2	—	11.475 ±.060	0.266 ±.006	12.007	291.47 ±1.52	6.76 ±0.15	304.98
-453	AS568-453	12	—	11.975 ±.060	0.266 ±.006	12.507	304.17 ±1.52	6.76 ±0.15	317.68
-454	AS568-454	12-1/2	—	12.475 ±.060	0.266 ±.006	13.007	316.87 ±1.52	6.76 ±0.15	330.38
-455	AS568-455	13	—	12.975 ±.060	0.266 ±.006	13.507	329.57 ±1.52	6.76 ±0.15	343.08
-456	AS568-456	13-1/2	—	13.457 ±.070	0.266 ±.006	13.989	342.27 ±1.78	6.76 ±0.15	355.78
-457	AS568-457	14	—	13.975 ±.070	0.266 ±.006	14.507	354.97 ±1.78	6.76 ±0.15	368.48
-458	AS568-458	14-1/2	—	14.475 ±.070	0.266 ±.006	15.007	367.67 ±1.78	6.76 ±0.15	381.18
-459	AS568-459	15	—	14.975 ±.070	0.266 ±.006	15.507	380.37 ±1.78	6.76 ±0.15	393.88
-460	AS568-460	15-1/2	—	15.475 ±.070	0.266 ±.006	16.007	393.07 ±1.78	6.76 ±0.15	406.58
-461	AS568-461	16	—	15.955 ±.075	0.266 ±.006	16.487	405.26 ±1.91	6.76 ±0.15	418.77
-462	AS568-462	16-1/2	—	16.455 ±.075	0.266 ±.006	16.987	417.96 ±1.91	6.76 ±0.15	431.47
-463	AS568-463	17	—	16.955 ±.080	0.266 ±.006	17.487	430.66 ±2.03	6.76 ±0.15	444.17
-464	AS568-464	17-1/2	—	17.455 ±.085	0.266 ±.006	17.987	443.36 ±2.16	6.76 ±0.15	456.87
-465	AS568-465	18	—	17.955 ±.085	0.266 ±.006	18.487	456.06 ±2.16	6.76 ±0.15	469.57
-466	AS568-466	18-1/2	—	18.455 ±.085	0.266 ±.006	18.987	468.76 ±2.16	6.76 ±0.15	482.27
-467	AS568-467	19	—	18.955 ±.090	0.266 ±.006	19.487	481.46 ±2.29	6.76 ±0.15	494.97
-468	AS568-468	19-1/2	—	19.455 ±.090	0.266 ±.006	19.987	494.16 ±2.29	6.76 ±0.15	507.67
-469	AS568-469	20	—	19.955 ±.095	0.266 ±.006	20.487	506.86 ±2.41	6.76 ±0.15	520.37
-470	AS568-470	21	—	20.955 ±.095	0.266 ±.006	21.487	532.26 ±2.41	6.76 ±0.15	545.77
-471	AS568-471	22	—	21.955 ±.100	0.266 ±.006	22.487	557.66 ±2.54	6.76 ±0.15	571.17
-472	AS568-472	23	—	22.940 ±.105	0.266 ±.006	23.472	582.68 ±2.67	6.76 ±0.15	596.19
-473	AS568-473	24	—	23.940 ±.110	0.266 ±.006	24.472	608.08 ±2.79	6.76 ±0.15	621.59
-474	AS568-474	25	—	24.940 ±.115	0.266 ±.006	25.472	633.48 ±2.92	6.76 ±0.15	646.99
-475	AS568-475	26	—	25.940 ±.120	0.266 ±.006	26.472	658.88 ±3.05	6.76 ±0.15	672.39

Other size charts

Need	Chart
AS568 dash (0xx-4xx)	AS568 O-Ring Size Chart
Metric / ISO 3601	Metric O-Ring Size Chart
JIS S/P/G/V	JIS B 2401 Size Chart
ORB / 900-series boss	ORB Boss Size Chart
Back-up rings	Backup Ring Size Chart
DIN 3771	DIN 3771 Size Chart
Generic Metric	Generic Metric Size Chart
BS 4518	BS 4518 Size Chart
BS 1806	BS 1806 Size Chart
NF T 47-501	NF T 47-501 Size Chart
SMS 1586	SMS 1586 Size Chart
X-Ring	X-Ring Size Chart
Square Ring	Square Ring Size Chart
Parker 500	Parker 500 Size Chart
ISO 6149 ports	ISO 6149 Size Chart
Search across standards	Master O-Ring Size Chart

History and explanation of square rings

What a square ring is

A square ring is a lathe-cut or molded square-section seal. Some static face and flange jobs prefer the flat contact of a square wall.

AS568 dash compatibility

Dashes align with AS568 so catalogs stay simple. Because the wall is square (and often slightly thinner than the round-cord CS), do not assume a square ring and an O-Ring of the same dash are identical in squeeze without checking the numbers above.

Using this chart

Match the dash, read square CS carefully, confirm the gland, then specify compound.

Square Ring Size Chart (AS568 Dash)

0xx series

1xx series

2xx series

3xx series

4xx series

Other size charts

History and explanation of square rings

What a square ring is

AS568 dash compatibility

Using this chart

Handbook

The O-Ring Store

Get In Touch

0xx series

1xx series

2xx series

3xx series

4xx series

Other size charts

Related

History and explanation of square rings

What a square ring is

AS568 dash compatibility

Using this chart

Handbook

The O-Ring Store

Get In Touch