568-388 FKM 75 SQUARE CUT RINGS

The SV70388 is an AS568-388 black Viton® (FKM) 70 Shore A Square-Cut Ring measuring an inside diameter of 18.953 in (481.41 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 19.373 in (492.07 mm). This square-cut ring provides an economical lathe-cut alternative where a moulded o-ring is not required.

Viton® (FKM) is specified here for long service life in hot, chemically aggressive environments and industry benchmark where nitrile reaches its thermal limit. Expect good resistance to petroleum oils and fuels, engine and transmission fluids, and chlorinated solvents. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. The profile itself contributes simple lathe-cut manufacture at low tooling cost and greater resistance to extrusion than a round section of the same size. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

It sees regular use in chemical processing, automotive fuel systems, and semiconductor equipment.

Stocked as SV70388 and sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.