Barbed Half Hoon truss rod washer

Gibson USA Standard, Half-moon washer: 11/32" x 9/16" x .100" steel (8.73mm x 14.29mm x 2.54mm) with two barbs.

Gibson USA Standard, Half-moon washer: 11/32" x 9/16" x .100" steel (8.73mm x 14.29mm x 2.54mm) with two barbs.