8400 SERIES BUNA CUP 3-1/2 X 4 X 1/4W

Ordered as NU8408-0350, this is a Buna-N (Nitrile) U-Cup Seal built to a 4 in outside diameter. The u-cup seal seals more effectively as system pressure increases, without added squeeze at rest.

As a material, Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, strong abrasion and tear resistance. It resists hydraulic fluids, petroleum-based oils, and greases and lubricants.

It sees regular use in fluid power, hydraulic and pneumatic systems, and construction equipment.

This item is sold individually under part number NU8408-0350. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.