This o-ring is supplied in AS568-021 black Buna-N (Nitrile) 50 Shore A supplied with an inside diameter of 0.926 in (23.52 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.066 in (27.08 mm), catalogued under part number H50021. It compresses into its gland to block fluid or gas migration across a joint.
The compound resists greases and lubricants, water, and propane and butane. Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).
You will find this material specified across agricultural equipment, fluid power, and automotive.
Order part number H50021, sold individually. Review your operating media and conditions against this specification before installation. 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 -021 BLACK BUNA 50D O-RING
Actual Cross Section 0.07 inch (1.78 mm)
Actual Inside Diameter 0.926 inch (23.52 mm)
Actual Outside Diameter 1.066 inch (27.08 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity