-166 BLACK FKM 75D O-RING

APG stocks the V70166, an AS568-166 black Viton® (FKM) 75 Shore A O-Ring supplied with an inside diameter of 6.737 in (171.12 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 6.943 in (176.35 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Expect good resistance to aromatic hydrocarbons, aggressive chemicals, and many acids. Viton® (FKM) is valued for the industry benchmark where nitrile reaches its thermal limit and very low compression set at elevated temperature. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). It is not the right choice where ketones and esters or hot water and steam are present.

Maintenance and OEM teams specify it across high-temperature process equipment, automotive fuel systems, and chemical processing.

Order part number V70166, sold individually. Unit weight is approximately 5.442 g and nominal inside diameter is listed as 6 3/4 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.