-381 BLACK BUNA 70D O-RING

H70381 is an AS568-381 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 11.975 in (304.17 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 12.395 in (314.83 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The compound resists propane and butane, petroleum-based oils, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs and low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or polar solvents are present.

Typical settings include general industrial maintenance, hydraulic and pneumatic systems, and construction equipment.

H70381 ships individually. Unit weight is approximately 26.3327 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.