Buna 70-128-Black-Pk100

APG stocks the SB-H70128-100, an AS568-128 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 1.487 in (37.77 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.693 in (43 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies. Supplementary detail from the product record: 1.6875IDX1.5"ODX.0938"CS.

The material holds up against water, propane and butane, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life.

Common environments for this compound include agricultural equipment, hydraulic and pneumatic systems, and automotive.

Reference part number SB-H70128-100 when ordering; the item is sold by the bag. 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.