4MM CS X 76MM ID BLACK BUNA 70D

The H4X76 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 76 mm (2.992 in), a cross section of 4 mm (0.157 in), and an outside diameter of 84 mm (3.31 in). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

It resists greases and lubricants, propane and butane, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for low compression set under sustained load and an economical choice for high-volume maintenance programs. 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 automotive, hydraulic and pneumatic systems, and construction equipment.

H4X76 ships individually. Unit weight is approximately 3.9071 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.