Baum Iron 8-252: Buna 90 B/U Ring


Regular price $5.32
Sale price $5.32 Regular price
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Buna-N NBR, 90 Shore A backup ring conforming to AS568-252. Dimensions are 5.234 in ID x 0.139 in cross-section and 5.512 in OD, with a 5 1/4 in nominal ID and 1/8 in nominal cross-section. The black, round-profile ring is intended to provide anti-extrusion support behind O-rings in high-pressure hydraulic and pneumatic glands. Listed temperature range is -40°F to 250°F, with resistance to oil, grease, fuel, and general hydraulic fluids.