8-013 BLACK FKM 90D BACK-UP RING

Part number VBU90013 is an AS568-013 black Viton® (FKM) 90 Shore A Back-Up Ring built to an inside diameter of 0.426 in (10.82 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.566 in (14.38 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

Viton® (FKM) is widely chosen for excellent resistance to compression set and permeation, the industry benchmark where nitrile reaches its thermal limit. Expect good resistance to aggressive chemicals, aromatic hydrocarbons, and petroleum oils and fuels. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C).

Typical settings include semiconductor equipment, automotive fuel systems, and chemical processing.

Order part number VBU90013, sold individually. Unit weight is approximately 0.123 g and nominal inside diameter is listed as 7/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.