Viton 75-339-Black-Pk5

APG stocks the SB-V70339-5, an AS568-339 black Viton® (FKM) 70 Shore A O-Ring with an inside diameter of 3.225 in (81.92 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.645 in (92.58 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint. This item is further identified as 0.210CSX3.225"IDX3.645"OD.

The material holds up against aggressive chemicals, many acids, and petroleum oils and fuels. That behavior comes from the compound itself: Viton® (FKM) is valued for excellent resistance to compression set and permeation, 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).

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

Reference part number SB-V70339-5 when ordering; the item is sold by the bag. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.