Buna 70-154-Black-Pk50

Ordered as SB-H70154-50, this is an AS568-154 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 3.737 in (94.92 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 3.943 in (100.15 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. Additional detail on this item: 3.9375IDX3.75"ODX.0938"CS.

Expect good resistance to greases and lubricants, propane and butane, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving ketones or ozone and direct sunlight call for a different compound.

Maintenance and OEM teams specify it across agricultural equipment, general industrial maintenance, and fluid power.

Stocked as SB-H70154-50 and sold by the bag. Nominal inside diameter is listed as 3 3/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.