8400 SERIES BUNA CUP 1 X 1-5/16 5/32

Part number NU8405-0100 is a Buna-N (Nitrile) U-Cup U-Cup Seal supplied with a 1 inch inside diameter, a 1-5/16 inch outside diameter, and a height of 5/32 inch. An u-cup seal uses a U-shaped profile that system pressure forces outward, tightening the seal as pressure rises.

This material stands up to water, propane and butane, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, low compression set under sustained load.

Common environments for this compound include hydraulic and pneumatic systems, automotive, and general industrial maintenance.

NU8405-0100 ships individually. Review your operating media and conditions against this specification before installation.