4139-514AD MINNESOTA RUBBER QUAD RING

The VQ4139 is an AS568-139 black Viton® (FKM) 75 Shore A quad profile Quad-Ring supplied with an inside diameter of 2.175 in (55.25 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.381 in (60.48 mm). This quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

This material stands up to many acids, engine and transmission fluids, and petroleum oils and fuels. Viton® (FKM) is widely chosen for excellent resistance to compression set and permeation, outstanding high-temperature capability. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Applications involving low-molecular-weight organic acids or ketones and esters call for a different compound.

Maintenance and OEM teams specify it across aerospace, oil and gas, and high-temperature process equipment.

VQ4139 ships individually. Nominal inside diameter is listed as 2 3/16. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.