Nitrile
Freudenberg N888: Low-Temp Aerospace Nitrile O-Ring (70 Duro NBR)
Freudenberg N888 is a 70 durometer low-temperature nitrile (NBR/Buna-N) O-Ring for aerospace: flexible to -65°F, qualified to MIL-G-5514 and SAE AS5440, built to AS28775, MS28775, and MS28784.
HNBR vs Buna-N Nitrile O-Rings: Same Fit, Longer Life
HNBR (Highly Saturated Nitrile) O-Rings drop into the same sizes as standard Buna-N and add higher heat, better wear, and longer service life. Full side-by-side.
HNBR (Hydrogenated Nitrile / HSN) O-Rings
HNBR (hydrogenated nitrile, HSN) O-Ring guide: temperature range, refrigerant and sour-gas resistance, cure systems, durometers, limitations, and the grades we stock.
Nitrile (Buna-N / NBR) O-Rings
Nitrile (Buna-N, NBR) O-Ring guide: temperature range, ACN content and what it changes, oil and fuel resistance, durometers, mil-spec grades, limitations, and everything we stock.
