3.1MM CS X 144.4MM ID BLACK BUNA 70D

Ordered as H3.1X144.4, this is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 144.4 mm (5.685 in), a cross section of 3.1 mm (0.122 in), and an outside diameter of 150.6 mm (5.93 in). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. Supplementary detail from the product record: Metric O-RING, JIS G145.

The material holds up against propane and butane, greases and lubricants, and many alcohols. Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or polar solvents.

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

Reference part number H3.1X144.4 when ordering; the item is sold individually. Unit weight is approximately 4.2458 g. 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.