189 - cup washer (raised)

Raised type cup washer, nickel plate on brass, for 4, 6 or 8 size screw. specify size or send sample. usually used on upholstery.
per packet of 100 pieces.
note dimensions approx:
4 screw size - 2.9mm, 7.75mm outside
6 screw size - 3.5mm, 9.65mm outside
8 screw size - 4.2mm, 11.70mm outside