-428 BLACK BUNA 70D O-RING

This o-ring is supplied in AS568-428 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 4.85 in (123.19 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.4 in (137.16 mm), catalogued under part number H70428. It provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to many alcohols, propane and butane, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) offers strong abrasion and tear resistance, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.

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

Reference part number H70428 when ordering; the item is sold individually. Unit weight is approximately 19.1671 g. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.