568-378 FKM 75 SQUARE CUT RINGS

Ordered as SV70378, this is an AS568-378 black Viton® (FKM) 70 Shore A square profile Quad-Ring measuring an inside diameter of 10.475 in (266.07 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 10.895 in (276.73 mm). The quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

This material stands up to aggressive chemicals, engine and transmission fluids, and aromatic hydrocarbons. That behavior comes from the compound itself: Viton® (FKM) delivers the industry benchmark where nitrile reaches its thermal limit and long service life in hot, chemically aggressive environments. 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 amines call for a different compound.

Maintenance and OEM teams specify it across aerospace, chemical processing, and semiconductor equipment.

Order part number SV70378, sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.