Autobar Assorted Copper Washers 5 Pack 5 Pack

Autobar 257 Assorted Copper Washers 5 PackA copper washer is a soft metal seal rather than a simple spacer, fitted under the head of a banjo bolt, sump plug, or similar fitting to seal against oil or fluid leaks. Copper is soft enough to deform slightly when the bolt is tightened, filling small surface imperfections and forming a tight seal, which is why it is often called a crush washer. Once crushed to fit a joint, a copper washer is generally not reused, since it will not seal as reliably a second time.This pack contains five copper washers across three sizes, 8mm, 10mm, and 12mm, covering the common sizes needed for oil sump plugs, brake banjo bolts, and similar fittings. Match the washer to the bolt or fitting it needs to seal, since a copper washer that is too large or too small will not seal correctly. Fit a new washer each time the joint is undone, rather than reusing one that has already been crushed.