No.12 (5.5mm) Solid Brass Surface Screw Cup Washers – To suit countersunk screws

Self-colour Brass
Use For: For surface mounting countersunk head screws
Allows screws to be used on surfaces that cannot be countersunk or are too thin
Use with woodscrews, self-tapping screws and machine screws
Brass version used with solid brass screw
Outer Diameter: 15.52mm
Thickness: 2.54mm