-261 BLACK FKM 70D SQUARE RING

Part number SV70261 is an AS568-261 black Viton® (FKM) 70 Shore A Square-Cut Ring measuring an inside diameter of 6.734 in (171.04 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 7.012 in (178.1 mm). A square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

This material stands up to aromatic hydrocarbons, engine and transmission fluids, and chlorinated solvents. That behavior comes from the compound itself: Viton® (FKM) offers outstanding high-temperature capability and 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). The profile itself contributes greater resistance to extrusion than a round section of the same size 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.

Common environments for this compound include oil and gas, aerospace, and automotive fuel systems.

This item is sold individually under part number SV70261. Application requirements vary, so validate compatibility with your process conditions prior to installation.