-351 BLACK BUNA 90D O-RING

Part number H90351 is an AS568-351 black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 4.725 in (120.02 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.145 in (130.68 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against water, petroleum-based oils, and many alcohols. Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to ketones or ozone and direct sunlight will shorten service life.

You will find this material specified across fluid power, agricultural equipment, and automotive.

H90351 ships individually. Unit weight is approximately 12.227 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.