Review on Uxcell Copper Washer Sealing Fastener Power Transmission Products for Control Cables & Accessories by Edwin White

Almost the same specification as the factory Brembo caliper/brake hose banjo bolts. Brembo calipers on C7 Corvettes (and many other cars) have dust seals for the pistons and will melt if the track is heavily pressed, so I rebuild the calipers when the dust caps burn out and the crush washers need to be replaced every time the caliper will away. GM sells OEM washers for over $2 each. It takes 8 washers for four calipers so you have 2 extra and after 4 rebuilds you have a full set for next time. Factory tightened and sealed.