Buna 70-121-Black-Pk20

APG stocks the SB-H70121-20, an AS568-121 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 1.049 in (26.64 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.255 in (31.88 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint. Source specification: 1.25IDX1.0625"ODX.0938"CS.

Buna-N (Nitrile) is specified here for low compression set under sustained load and economical choice for high-volume maintenance programs. It resists greases and lubricants, hydraulic fluids, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to ozone and direct sunlight or strong acids will shorten service life.

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

This item is sold by the bag under part number SB-H70121-20. Nominal inside diameter is listed as 1 1/16 inch. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.