*4138-366Y MINNESOTA RUBBER QUAD RING

This quad-ring is supplied in AS568-138 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 0.112 in (2.84 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.318 in (58.88 mm), catalogued under part number HQ4138. It resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

As a material, Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, strong abrasion and tear resistance. This material stands up to greases and lubricants, hydraulic fluids, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or polar solvents call for a different compound. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

You will find this material specified across agricultural equipment, automotive, and fluid power.

This item is sold individually under part number HQ4138. Application requirements vary, so validate compatibility with your process conditions prior to installation.