Buna 70-436-Black-Pk5

APG stocks the SB-H70436-5, an AS568-436 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 5.85 in (148.59 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.4 in (162.56 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint. Additional detail on this item: 0.275CSX5.850"IDX6.400"OD.

Expect good resistance to propane and butane, water, and greases and lubricants. Buna-N (Nitrile) delivers low compression set under sustained load, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or polar solvents will shorten service life.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, construction equipment, and fluid power.

Reference part number SB-H70436-5 when ordering; the item is sold by the bag. Nominal inside diameter is listed as 5 7/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.