Buna 70-437-Black-Pk5

Ordered as SB-H70437-5, this is an AS568-437 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 5.975 in (151.77 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.525 in (165.74 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies. This item is further identified as 6.5IDX6"ODX.25"CS.

This material stands up to water, propane and butane, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Common environments for this compound include agricultural equipment, automotive, and construction equipment.

Stocked as SB-H70437-5 and sold by the bag. 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.