Buna 70-217-Black-Pk100

APG stocks the SB-H70217-100, an AS568-217 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 1.171 in (29.74 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.449 in (36.8 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. This item is further identified as 1.4375IDX1.1875"ODX.125"CS.

This material stands up to greases and lubricants, propane and butane, and many alcohols. Buna-N (Nitrile) is known for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or polar solvents call for a different compound.

Maintenance and OEM teams specify it across automotive, general industrial maintenance, and agricultural equipment.

Stocked as SB-H70217-100 and sold by the bag. Nominal inside diameter is listed as 1 3/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.