Sizing
SAE J1926 ORB Boss O-Rings: AS568 900-Series Sizes That Actually Seal the Port
What SAE J1926 O-Ring Boss fittings need from the seal: AS568-901…932 boss O-Rings, how they differ from NPT and JIC, materials, install tips, and a Boss-only size chart.
The Master O-Ring Size Chart: What It Shows, Why It Helps, and Who It Is For
A practical guide to the handbook Master O-Ring Size Chart: multi-standard sizing, nearest-match search, tolerances, back-up rings, and who gets the most from it.
How to Measure an O-Ring
Two dimensions, one common mistake, and when to measure the groove instead.
Backup Ring Size Chart
AS568 back-up ring size chart: dash numbers with ID, width, height, and contour dimensions for high-pressure extrusion protection.
O-Ring Cord Tolerances (RMA / ARPM E1, E2, E3)
Cross-sectional tolerance for extruded O-Ring cord: the RMA/ARPM Table 13 and ISO 3302-1 classes E1, E2 and E3 in inch and millimeter, how cord compares to a molded O-Ring, how material and durometer change what a mill can hold, plus sponge and cut length tables.
O-Ring Groove & Gland Dimension Charts
The complete O-Ring groove reference: interactive gland dimension charts for radial, face, dovetail, hydraulic, pneumatic, and floating styles, plus squeeze, fill, extrusion, finish, and install chamfer guides.
How to Measure an O-Ring
How to measure O-Ring ID and cross-section with calipers, pi-tape, size cones, slide gauges, and lab vision systems, and why we recommend Olypsys® first.
Master O-Ring Size Chart
Filterable multi-standard O-Ring size chart, search by ID or cross-section across AS568, ISO, JIS, BS, DIN and more.
O-Ring Size Charts & Standards (AS568 & Metric)
AS568 and metric O-Ring size charts, dash numbers, groove design, and how to measure an existing seal.
