Cup, Lock Washer, Plain Washer, Full Washers, Form A
Brass, 301 Stainless Steel, Steel, Stainless Steel, Copper
4 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.85 mm, 2.1 mm, 6.4 mm, 16.2 mm, 6.5 mm
0.7 mm, 8.1 mm, 1.6 mm, 2.5 mm, 2.2 mm
M10, M5 (Form A), M16, M5, M3
DIN 6797A, BS 4320B, BS 4463, DIN 6797J, DIN 125A