-004 BROWN FKM 90D O-RING

This o-ring is supplied in AS568-004 brown Viton® (FKM) 90 Shore A with an inside diameter of 0.07 in (1.78 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.21 in (5.33 mm), catalogued under part number VB90004. It provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The material holds up against many acids, engine and transmission fluids, and aromatic hydrocarbons. That behavior comes from the compound itself: Viton® (FKM) is valued for long service life in hot, chemically aggressive environments and the industry benchmark where nitrile reaches its thermal limit. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. It is not the right choice where low-molecular-weight organic acids or ketones and esters are present.

You will find this material specified across oil and gas, semiconductor equipment, and automotive fuel systems.

Order part number VB90004, sold individually. Nominal inside diameter is listed as 5/64 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.