Ordered as H2X27, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 27 mm (1.063 in), a cross section of 2 mm (0.079 in), and an outside diameter of 31 mm (1.22 in). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
As a material, Buna-N (Nitrile) is valued for strong abrasion and tear resistance, reliable performance in both static and dynamic service. This material stands up to many alcohols, water, and greases and lubricants. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or polar solvents call for a different compound.
Maintenance and OEM teams specify it across general industrial maintenance, automotive, and fluid power.
Reference part number H2X27 when ordering; the item is sold individually. Unit weight is approximately 0.358 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Description 2MM CS X 27MM ID BLACK BUNA 70D
Actual Outside Diameter 31 mm (1.22 inch)
Actual Cross Section 2 mm (0.079 inch)
Actual Inside Diameter 27 mm (1.063 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity