Buna 70-019-Black-Pk25

The SB-H70019-25 is an AS568-019 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 0.801 in (20.35 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.941 in (23.9 mm). This o-ring delivers dependable bidirectional sealing in a compact groove envelope. Additional detail on this item:0.9375IDX.8125"ODX.0625"CS.

This material stands up to water, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for strong abrasion and tear resistance, low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving automotive brake fluid or ozone and direct sunlight call for a different compound.

Maintenance and OEM teams specify it across fluid power, hydraulic and pneumatic systems, and construction equipment.

Reference part number SB-H70019-25 when ordering; the item is sold by the bag. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.