Buna 70-155-Black-Pk10

This o-ring is supplied in AS568-155 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 3.987 in (101.27 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.193 in (106.5 mm), catalogued under part number SB-H70155-10. It compresses into its gland to block fluid or gas migration across a joint. Source specification: 0.103CSX3.987"IDX4.193"OD.

The compound resists hydraulic fluids, greases and lubricants, and many alcohols. Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs and low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

Maintenance and OEM teams specify it across automotive, fluid power, and construction equipment.

This item is sold by the bag under part number SB-H70155-10. Nominal inside diameter is listed as 4 inch. Review your operating media and conditions against this specification before installation.