Buna 70-029-Black-Pk10

SB-H70029-10 is an AS568-029 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 1.489 in (37.82 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.629 in (41.38 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint. This item is further identified as 1.625IDX1.5"ODX.0625"CS.

The compound resists propane and butane, greases and lubricants, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where polar solvents or ketones are present.

You will find this material specified across general industrial maintenance, automotive, and construction equipment.

Stocked as SB-H70029-10 and sold by the bag. Application requirements vary, so validate compatibility with your process conditions prior to 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.