Ordered as H90320, this is an AS568-320 black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 1.1 in (27.94 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.52 in (38.61 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
The compound resists petroleum-based oils, propane and butane, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to ozone and direct sunlight or automotive brake fluid will shorten service life.
Typical settings include automotive, general industrial maintenance, and agricultural equipment.
Order part number H90320, sold individually. Unit weight is approximately 3.1516 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Description -320 BLACK BUNA 90D O-RING
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 1.1 inch (27.94 mm)
Actual Outside Diameter 1.52 inch (38.61 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity