-351 BLACK BUNA 70D O-RING

APG stocks the H70351, an AS568-351 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 4.725 in (120.02 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.145 in (130.68 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

The material holds up against propane and butane, petroleum-based oils, and greases and lubricants. Buna-N (Nitrile) delivers strong abrasion and tear resistance, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in polar solvents or strong acids.

It sees regular use in automotive, construction equipment, and fluid power.

Reference part number H70351 when ordering; the item is sold individually. Unit weight is approximately 0.0107 g and nominal inside diameter is listed as 4 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.