3/8 x .666 OD x .05 RBSL Zn

Rubber bonded sealing washer for 3/8" brake line fittings, with 0.666" outer diameter and 0.05" thickness. The zinc-plated steel backing provides structure while the bonded rubber creates a leak-proof seal when the banjo bolt is torqued down.

Used throughout the Rush SR brake system at banjo fitting connections—between brake valves, master cylinders, calipers, and braided brake hoses. These sealing washers are crush washers and should be replaced any time you disconnect a brake line fitting. Reusing old washers risks brake fluid leaks.

Sold individually. Each banjo bolt connection requires two washers (one on each side of the banjo fitting). Stock up on these—you'll need fresh washers every time you service the brake system.