H90284 is an AS568-284 black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 17.955 in (456.06 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 18.233 in (463.12 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.
The compound resists hydraulic fluids, petroleum-based oils, and propane and butane. Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or automotive brake fluid are present.
You will find this material specified across construction equipment, automotive, and hydraulic and pneumatic systems.
H90284 ships individually. Unit weight is approximately 19.0964 g. 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 -284 BLACK BUNA 90D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 17.955 inch (456.06 mm)
Actual Outside Diameter 18.233 inch (463.12 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity