-239 BROWN FKM 75D O-RING

APG stocks the VB75239, an AS568-239 brown Viton® (FKM) 75 Shore A O-Ring built to an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The material holds up against aromatic hydrocarbons, aggressive chemicals, and many acids. That behavior comes from the compound itself: Viton® (FKM) offers long service life in hot, chemically aggressive environments and outstanding high-temperature capability. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Applications involving ketones and esters or hot water and steam call for a different compound.

It sees regular use in aerospace, chemical processing, and high-temperature process equipment.

This item is sold individually under part number VB75239. Unit weight is approximately 5.9654 g and nominal inside diameter is listed as 3 5/8 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.