APG stocks the H70023, an AS568-023 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 1.051 in (26.7 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.191 in (30.25 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.
It resists petroleum-based oils, propane and butane, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for low compression set under sustained load, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or ketones call for a different compound.
Typical settings include construction equipment, hydraulic and pneumatic systems, and fluid power.
Order part number H70023, sold individually. Unit weight is approximately 0.2743 g. 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.
Description -023 BLACK BUNA 70D O-RING
Actual Cross Section 0.07 inch (1.78 mm)
Actual Inside Diameter 1.051 inch (26.7 mm)
Actual Outside Diameter 1.191 inch (30.25 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity