568-394 FKM 75 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-394 black Viton® (FKM) 70 Shore A measuring an inside diameter of 24.94 in (633.48 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 25.36 in (644.14 mm), catalogued under part number SV70394. It resists the spiral failure that affects round rings on long reciprocating strokes.

As a material, Viton® (FKM) is valued for outstanding high-temperature capability, excellent resistance to compression set and permeation. The material holds up against chlorinated solvents, petroleum oils and fuels, and engine and transmission fluids. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). It is not the right choice where low-molecular-weight organic acids or hot water and steam are present. 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.

Maintenance and OEM teams specify it across automotive fuel systems, aerospace, and chemical processing.

This item is sold individually under part number SV70394. Nominal inside diameter is listed as 25 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.