Part number H70261 is an AS568-261 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 6.734 in (171.04 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 7.012 in (178.1 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, most widely specified general-purpose sealing elastomer. It resists many alcohols, greases and lubricants, and water. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or automotive brake fluid call for a different compound.
It sees regular use in general industrial maintenance, agricultural equipment, and fluid power.
H70261 ships individually. Unit weight is approximately 6.555 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description -261 BLACK BUNA 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 6.734 inch (171.04 mm)
Actual Outside Diameter 7.012 inch (178.1 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity