4312-514AD MINNESOTA RUBBER QUAD RING

APG stocks the VQ4312, an AS568-312 black Viton® (FKM) 75 Shore A quad profile Quad-Ring supplied with an inside diameter of 0.6 in (15.24 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.02 in (25.91 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

As a material, Viton® (FKM) is widely chosen for long service life in hot, chemically aggressive environments and the industry benchmark where nitrile reaches its thermal limit. The material holds up against petroleum oils and fuels, aggressive chemicals, and engine and transmission fluids. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Exposure to low-molecular-weight organic acids or ketones and esters will shorten service life.

Maintenance and OEM teams specify it across oil and gas, semiconductor equipment, and chemical processing.

This item is sold individually under part number VQ4312. Nominal inside diameter is listed as 5/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.