8400 BUNA CUP 1/2 X 3/4 X 1/8 W

APG stocks the NU8404-0050, a Buna-N (Nitrile) U-Cup U-Cup Seal supplied with a 1/2 inch inside diameter, a 3/4 inch outside diameter, and a height of 1/8 inch. An u-cup seal delivers pressure-energized single-acting sealing on rods and pistons.

This material stands up to hydraulic fluids, many alcohols, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs.

You will find this material specified across general industrial maintenance, fluid power, and agricultural equipment.

Order part number NU8404-0050, sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.