Viton 75-343-Black-Pk2

This o-ring is supplied in AS568-343 black Viton® (FKM) 70 Shore A with an inside diameter of 3.725 in (94.62 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.145 in (105.28 mm), catalogued under part number SB-V70343-2. It compresses into its gland to block fluid or gas migration across a joint. Supplementary detail from the product record: 0.210CSX3.725"IDX4.145"OD.

Viton® (FKM) is specified here for excellent resistance to compression set and permeation, industry benchmark where nitrile reaches its thermal limit. Expect good resistance to many acids, engine and transmission fluids, and petroleum oils and fuels. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Applications involving ketones and esters or low-molecular-weight organic acids call for a different compound.

Common environments for this compound include chemical processing, semiconductor equipment, and oil and gas.

SB-V70343-2 ships by the bag. Nominal inside diameter is listed as 3 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.