Buna 70-248-Black-Pk25

APG stocks the SB-H70248-25, an AS568-248 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 4.734 in (120.24 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.012 in (127.3 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. This item is further identified as 5IDX4.75"ODX.125"CS.

Buna-N (Nitrile) is specified here for low compression set under sustained load, reliable performance in both static and dynamic service. It resists hydraulic fluids, petroleum-based oils, and propane and butane. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or ketones.

Common environments for this compound include hydraulic and pneumatic systems, construction equipment, and general industrial maintenance.

Order part number SB-H70248-25, sold by the bag. As always, verify media compatibility and operating conditions against the requirements of your specific application.