4217-366Y MINNESOTA RUBBER QUAD RING

The HQ4217 is an AS568-217 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 0.171 in (4.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.449 in (36.8 mm). This quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

As a material, Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, low compression set under sustained load. This material stands up to water, many alcohols, and propane and butane. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life. The profile itself contributes a parting line located away from the sealing surface and lower compressive load required to achieve a seal.

Maintenance and OEM teams specify it across construction equipment, hydraulic and pneumatic systems, and agricultural equipment.

Stocked as HQ4217 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.