-108 BLACK FKM 70D SQUARE RING

Ordered as SV70108, this is an AS568-108 black Viton® (FKM) 70 Shore A Square-Cut Ring supplied with an inside diameter of 0.237 in (6.02 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.443 in (11.25 mm). The square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

Expect good resistance to many acids, chlorinated solvents, and aromatic hydrocarbons. That behavior comes from the compound itself: Viton® (FKM) is widely chosen for outstanding high-temperature capability and the industry benchmark where nitrile reaches its thermal limit. Service temperature is rated from -15°F (-26.1°C) through 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 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.

Common environments for this compound include aerospace, semiconductor equipment, and chemical processing.

This item is sold individually under part number SV70108. Application requirements vary, so validate compatibility with your process conditions prior to installation.