-383 BLACK BUNA 70D O-RING

Ordered as H70383, this is an AS568-383 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 13.975 in (354.97 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 14.395 in (365.63 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

The material holds up against many alcohols, greases and lubricants, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) offers low compression set under sustained load and an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

Maintenance and OEM teams specify it across fluid power, general industrial maintenance, and agricultural equipment.

Order part number H70383, sold individually. Unit weight is approximately 30.8443 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.