-387 BLACK BUNA 70D O-RING

This o-ring is supplied in AS568-387 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 17.955 in (456.06 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 18.375 in (466.73 mm), catalogued under part number H70387. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, strong abrasion and tear resistance. It resists hydraulic fluids, many alcohols, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or strong acids are present.

Maintenance and OEM teams specify it across general industrial maintenance, construction equipment, and agricultural equipment.

H70387 ships individually. Unit weight is approximately 39.4984 g and nominal inside diameter is listed as 18 inch. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.