**4050-514AD MINNESOTA RUBBER QUAD RING

VQ4050 is an AS568-050 black Viton® (FKM) 75 Shore A quad profile Quad-Ring measuring an inside diameter of 5.239 in (133.07 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 5.379 in (136.63 mm). In service, 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 chlorinated solvents, aromatic hydrocarbons, and many acids. Viton® (FKM) offers the industry benchmark where nitrile reaches its thermal limit, excellent resistance to compression set and permeation. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service.

Maintenance and OEM teams specify it across automotive fuel systems, aerospace, and chemical processing.

Stocked as VQ4050 and sold individually. 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.