This o-ring is supplied in AS568-206 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 0.484 in (12.29 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.762 in (19.35 mm), catalogued under part number H70206. It 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. Expect good resistance to propane and butane, hydraulic fluids, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where automotive brake fluid or polar solvents are present.
You will find this material specified across hydraulic and pneumatic systems, construction equipment, and general industrial maintenance.
H70206 ships individually. Unit weight is approximately 0.594 g and nominal inside diameter is listed as 1/2 inch. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
description -206 BLACK BUNA 70D O-RING
uf_description2 0.139" (3.53MM) CS X 0.484" (12.29MM) ID
Actual_CS 0.139 inch (3.53 mm)
Actual_ID 0.484 inch (12.29 mm)
Actual_OD 0.762 inch (19.35 )
ProductCode Description O-Rings - Bulk - Commodity