-331 WHITE BUNA 70D FDA O-RING

Part number H70FDA331 is an AS568-331 white Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 2.225 in (56.52 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.645 in (67.18 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

It resists many alcohols, hydraulic fluids, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) offers strong abrasion and tear resistance, low compression set under sustained load. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or ketones call for a different compound.

The compound meets FDA requirements for food contact, is metal detectable for HACCP and foreign-body control programs. Common environments for this compound include construction equipment, general industrial maintenance, and hydraulic and pneumatic systems.

Reference part number H70FDA331 when ordering; the item is sold individually. Unit weight is approximately 5.52 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.