-203 BLACK BUNA 70D O-RING

The H70203 is an AS568-203 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 0.296 in (7.52 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.574 in (14.58 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, Buna-N (Nitrile) offers reliable performance in both static and dynamic service, strong abrasion and tear resistance. The compound resists hydraulic fluids, greases and lubricants, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or polar solvents will shorten service life.

Maintenance and OEM teams specify it across general industrial maintenance, automotive, and construction equipment.

Reference part number H70203 when ordering; the item is sold individually. Unit weight is approximately 0.0005 g and nominal inside diameter is listed as 5/16 inch. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.