3.5MM CS X 210MM ID BLACK BUNA 70D

Ordered as H3.5X210, this is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 210 mm (8.268 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 217 mm (8.54 in). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Expect good resistance to petroleum-based oils, hydraulic fluids, and many alcohols. Buna-N (Nitrile) offers low compression set under sustained load, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ketones or polar solvents are present.

It sees regular use in automotive, general industrial maintenance, and construction equipment.

Order part number H3.5X210, sold individually. Unit weight is approximately 8.41 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.