-120 BLACK BUNA 90D O-RING

H90120 is an AS568-120 black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 0.987 in (25.07 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.193 in (30.3 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. The material holds up against many alcohols, greases and lubricants, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where strong acids or automotive brake fluid are present.

Maintenance and OEM teams specify it across agricultural equipment, automotive, and construction equipment.

Reference part number H90120 when ordering; the item is sold individually. Unit weight is approximately 0.6338 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.