Q-128 FLUOROELASTOMER 75 Q RING

Ordered as QV70128, this is an AS568-128 black Viton® (FKM) 75 Shore A Quad-Ring measuring an inside diameter of 1.487 in (37.77 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.693 in (43 mm). The quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

This material stands up to engine and transmission fluids, aromatic hydrocarbons, and many acids. That behavior comes from the compound itself: Viton® (FKM) is widely chosen for the industry benchmark where nitrile reaches its thermal limit, excellent resistance to compression set and permeation. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Verify compatibility before use with amines or hot water and steam. The profile itself contributes lower compressive load required to achieve a seal and resistance to the spiral twisting that defeats round-section rings.

You will find this material specified across aerospace, chemical processing, and semiconductor equipment.

QV70128 ships individually. Unit weight is approximately 1.371 g. 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.