-421 BLACK BUNA 70D O-RING

Part number H70421 is an AS568-421 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 3.975 in (100.97 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 4.525 in (114.94 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

This material stands up to propane and butane, greases and lubricants, and petroleum-based oils. Buna-N (Nitrile) is specified for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with strong acids or polar solvents.

Typical settings include automotive, construction equipment, and hydraulic and pneumatic systems.

Stocked as H70421 and sold individually. Unit weight is approximately 15.8 g and nominal inside diameter is listed as 4 inch. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.