The Wilwood washer (.640 ID x 1.188 OD x .063 thick) is specified as brake hardware for compatible Wilwood applications. Wilwood's washers are manufactured from high-strength alloy steel or stainless steel and plated with anti-corrosion finishes or treatments, providing correct spacing and protective finish for brake kit assemblies where this washer dimension is required.
Wilwood .640 ID x 1.188 ODx.063 Washer