Buna 70-261-Black-Pk10

SB-H70261-10 is an AS568-261 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 6.734 in (171.04 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 7.012 in (178.1 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint. The catalog record notes: 7IDX6.75"ODX.125"CS.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. The material holds up against hydraulic fluids, petroleum-based oils, and greases and lubricants. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in automotive brake fluid or ozone and direct sunlight.

Common environments for this compound include construction equipment, general industrial maintenance, and fluid power.

Stocked as SB-H70261-10 and sold by the bag. Nominal inside diameter is listed as 6 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design.