4227-366Y MINNESOTA RUBBER QUAD RING

This quad-ring is supplied in AS568-227 black Buna-N (Nitrile) 70 Shore A quad profile with an inside diameter of 2.109 in (53.57 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.387 in (60.63 mm), catalogued under part number HQ4227. It seats in a standard o-ring gland while offering improved dynamic performance.

Buna-N (Nitrile) is specified here for low compression set under sustained load, strong abrasion and tear resistance. The compound resists petroleum-based oils, hydraulic fluids, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or strong acids will shorten service life.

Maintenance and OEM teams specify it across construction equipment, fluid power, and automotive.

HQ4227 ships individually. Nominal inside diameter is listed as 2 1/8. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.