5.7MM CS X 129.2MM ID BLACK FKM 75D

Ordered as V5.7X129.2, this is a black Viton® (FKM) 75 Shore A O-Ring built to an inside diameter of 129.2 mm (5.087 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 140.6 mm (5.54 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

It resists many acids, chlorinated solvents, and aromatic hydrocarbons. That behavior comes from the compound itself: Viton® (FKM) offers excellent resistance to compression set and permeation, the industry benchmark where nitrile reaches its thermal limit. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Exposure to hot water and steam or amines will shorten service life.

It sees regular use in semiconductor equipment, aerospace, and automotive fuel systems.

V5.7X129.2 ships individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.