FAB PISTON CUP 2 1/2 OD X 1/2 X 1/8

K250-750 is a Buna-N (Nitrile) U-Cup U-Cup Seal measuring a 1/2 inch inside diameter, a 2-1/2 inch outside diameter, and a height of 1/8 inch. In service, this u-cup seal delivers pressure-energized single-acting sealing on rods and pistons. Additional detail on this item: With 3/4 ID Hole IN Center.

The compound resists water, petroleum-based oils, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Exposure to automotive brake fluid or polar solvents will shorten service life.

It sees regular use in fluid power, agricultural equipment, and construction equipment.

K250-750 ships individually. 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.