*4215-366Y MINNESOTA RUBBER QUAD RING

Part number HQ4215 is an AS568-215 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 1.046 in (26.57 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.324 in (33.63 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, low compression set under sustained load. The material holds up against petroleum-based oils, water, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in ketones or automotive brake fluid. The profile itself contributes two sealing bands per contact face rather than one and lower compressive load required to achieve a seal.

You will find this material specified across agricultural equipment, general industrial maintenance, and hydraulic and pneumatic systems.

This item is sold individually under part number HQ4215. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.