-365 BLACK BUNA 70D O-RING

Ordered as H70MD365, this is an AS568-365 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 6.975 in (177.17 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 7.395 in (187.83 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

This material stands up to propane and butane, petroleum-based oils, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life.

The compound is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across general industrial maintenance, automotive, and fluid power.

Reference part number H70MD365 when ordering; the item is sold individually. Nominal inside diameter is listed as 7 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.