4216-366Y MINNESOTA RUBBER QUAD RING

The HQ4216 is an AS568-216 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 1.109 in (28.17 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.387 in (35.23 mm). This quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

The compound resists hydraulic fluids, water, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) delivers low compression set under sustained load, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or polar solvents. The profile itself contributes a parting line located away from the sealing surface and two sealing bands per contact face rather than one.

You will find this material specified across hydraulic and pneumatic systems, agricultural equipment, and automotive.

Order part number HQ4216, sold individually. Nominal inside diameter is listed as 1 1/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.