-327 BLACK BUNA 70D O-RING

Part number H70MD327 is an AS568-327 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 1.725 in (43.82 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.145 in (54.48 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

This material stands up to water, petroleum-based oils, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs and low compression set under sustained load. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to ozone and direct sunlight or ketones will shorten service life.

This item is metal detectable for HACCP and foreign-body control programs. You will find this material specified across general industrial maintenance, agricultural equipment, and fluid power.

This item is sold individually under part number H70MD327. Nominal inside diameter is listed as 1 3/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.