Parker’s KA157 is a 70-Durometer Black Hydrogenated Nitrile (HNBR) O-ring material. Hydrogenated nitrile is a synthetic polymer that results from the hydrogenation of nitrile rubber (NBR). Superior mechanical characteristics, particularly high strength, helps reduce extrusion and wear.

O-Ring Size (AS-568): 020
Inner Diameter (In.): 0.864
Cross Section (In.): 0.070
Specification: Commercial
O-Ring Size Series: 000 Series