568-380 FKM 75 SQUARE CUT RINGS

APG stocks the SV70380, an AS568-380 black Viton® (FKM) 70 Shore A Square-Cut Ring measuring an inside diameter of 11.475 in (291.47 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 11.895 in (302.13 mm). A square-cut ring seals with a broad flat contact band instead of the line contact of a round-section ring.

As a material, Viton® (FKM) is valued for excellent resistance to compression set and permeation, outstanding high-temperature capability. The compound resists chlorinated solvents, engine and transmission fluids, and aromatic hydrocarbons. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). Applications involving ketones and esters or hot water and steam call for a different compound. The profile itself contributes simple lathe-cut manufacture at low tooling cost and a flat contact band that spreads sealing load across a wider area. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

You will find this material specified across automotive fuel systems, high-temperature process equipment, and aerospace.

SV70380 ships individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.