-004 BLACK BUNA 90D O-RING

Ordered as H90004, this is an AS568-004 black Buna-N (Nitrile) 90 Shore A O-Ring measuring an inside diameter of 0.07 in (1.78 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.21 in (5.33 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) is known for low compression set under sustained load, reliable performance in both static and dynamic service. This material stands up to propane and butane, petroleum-based oils, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or strong acids are present.

Maintenance and OEM teams specify it across automotive, general industrial maintenance, and fluid power.

Reference part number H90004 when ordering; the item is sold individually. Unit weight is approximately 0.0376 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.