APG H70429 Buna-N 70 Durometer O-Ring

The APG H70429 (also cataloged as 568-429 BUNA 70 ORINGS) is a premium commodity bulk O-ring engineered for reliable general-purpose sealing in industrial, hydraulic, and pneumatic equipment. Manufactured from black Buna-N (Nitrile / NBR) rubber with a standard 70 durometer hardness, it provides excellent resistance to petroleum-based fluids, lubricants, hydraulic oils, cold water, and fuels. This imported O-ring strictly complies with the AS568 aerospace standard for size -429, featuring a nominal inside diameter of 5 inches, a nominal outside diameter of 5-1/2 inches, and a 1/4 inch cross-section (precisely 4.975" ID x 0.275" CS). With a versatile operating temperature range of -40°F to 250°F (-40°C to 121°C), it serves as a highly resilient and abrasion-resistant seal.