-121 BLACK CHEMOURS VITON 75D O-RING

This o-ring is supplied in AS568-121 black Viton® (FKM) 75 Shore A with an inside diameter of 1.049 in (26.64 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.255 in (31.88 mm), catalogued under part number VITON75121. It compresses into its gland to block fluid or gas migration across a joint.

It resists many acids, engine and transmission fluids, and chlorinated solvents. That behavior comes from the compound itself: Viton® (FKM) is known for very low compression set at elevated temperature and the industry benchmark where nitrile reaches its thermal limit. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). It is not the right choice where low-molecular-weight organic acids or amines are present.

Common environments for this compound include oil and gas, aerospace, and automotive fuel systems.

VITON75121 ships individually. Unit weight is approximately 0.913 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.