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

This u-cup seal is supplied in Buna-N (Nitrile) with a 1/4 inch inside diameter, a 1/2 inch outside diameter, and a height of 1/8 inch, catalogued under part number NU8404-0025. It seals more effectively as system pressure increases, without added squeeze at rest.

Expect good resistance to many alcohols, water, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer.

Common environments for this compound include construction equipment, general industrial maintenance, and fluid power.

Order part number NU8404-0025, sold individually. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.