8-102 BLACK BUNA 90D BACK-UP RING

The HB90102 is an AS568-102 black Buna-N (Nitrile) 90 Shore A Back-Up Ring built to an inside diameter of 0.049 in (1.24 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.255 in (6.48 mm). This back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. The material holds up against greases and lubricants, many alcohols, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with ketones or polar solvents.

It sees regular use in general industrial maintenance, fluid power, and construction equipment.

Order part number HB90102, sold individually. Unit weight is approximately 0.043 g and nominal inside diameter is listed as 1/16 inch. Review your operating media and conditions against this specification before installation.