4MM CS X 174MM ID BLACK BUNA 70D

H4X174 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 174 mm (6.85 in), a cross section of 4 mm (0.157 in), and an outside diameter of 182 mm (7.17 in). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

It resists petroleum-based oils, water, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Maintenance and OEM teams specify it across general industrial maintenance, hydraulic and pneumatic systems, and agricultural equipment.

This item is sold individually under part number H4X174. Unit weight is approximately 8.624 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.