Buna 70-216-Black-Pk100

The SB-H70216-100 is an AS568-216 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 1.109 in (28.17 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.387 in (35.23 mm). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. This item is further identified as 1.375IDX1.125"ODX.125"CS.

This material stands up to hydraulic fluids, water, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or strong acids call for a different compound.

Typical settings include automotive, fluid power, and construction equipment.

Reference part number SB-H70216-100 when ordering; the item is sold by the bag. As always, verify media compatibility and operating conditions against the requirements of your specific application. 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.