Ordered as H90204, this is an AS568-204 black Buna-N (Nitrile) 90 Shore A O-Ring measuring an inside diameter of 0.359 in (9.12 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.637 in (16.18 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.
As a material, Buna-N (Nitrile) is specified for low compression set under sustained load, strong abrasion and tear resistance. This material stands up to greases and lubricants, petroleum-based oils, and hydraulic fluids. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).
Typical settings include general industrial maintenance, construction equipment, and agricultural equipment.
Reference part number H90204 when ordering; the item is sold individually. Unit weight is approximately 0.5256 g and nominal inside diameter is listed as 3/8 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Description -204 BLACK BUNA 90D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 0.359 inch (9.12 mm)
Actual Outside Diameter 0.637 inch (16.18 )
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity