8-463 BLACK BUNA 90D BACK-UP RING

This back-up ring is supplied in AS568-463 black Buna-N (Nitrile) 90 Shore A supplied with an inside diameter of 16.955 in (430.66 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 17.505 in (444.63 mm), catalogued under part number HB90463. It extends o-ring service life by supporting the seal against extrusion under high pressure.

The compound resists water, propane and butane, and greases and lubricants. Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving ozone and direct sunlight or automotive brake fluid call for a different compound.

Maintenance and OEM teams specify it across automotive, hydraulic and pneumatic systems, and fluid power.

HB90463 ships individually. Unit weight is approximately 29.134 g and nominal inside diameter is listed as 17 inch. Review your operating media and conditions against this specification before installation.