.313 (5/16) SQUARE BUNA 70 O-RING CORD

This square-cut cord stock is supplied in black Buna-N (Nitrile) 70 Shore A supplied with a cross section of 0.313 in (8 mm), catalogued under part number 0296313. It ships as continuous square-cut stock so a custom-length seal can be cut and spliced on site.

Expect good resistance to propane and butane, petroleum-based oils, and hydraulic fluids. Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, strong abrasion and tear resistance. Exposure to automotive brake fluid or polar solvents will shorten service life. The profile itself contributes a flat contact band that spreads sealing load across a wider area and a rectangular section that will not roll in the groove. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

Maintenance and OEM teams specify it across general industrial maintenance, automotive, and fluid power.

This item is sold by the foot under part number 0296313. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.