-251 BLACK FKM 75D O-RING

Ordered as V70251, this is an AS568-251 black Viton® (FKM) 75 Shore A O-Ring with an inside diameter of 5.109 in (129.77 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.387 in (136.83 mm). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Viton® (FKM) is known for very low compression set at elevated temperature and the industry benchmark where nitrile reaches its thermal limit. The compound resists aggressive chemicals, engine and transmission fluids, and aromatic hydrocarbons. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Verify compatibility before use with hot water and steam or ketones and esters.

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

Order part number V70251, sold individually. Unit weight is approximately 7.405 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.