Internal Tooth, Countersunk Washer, Plain Washer, Full Washers, Form A
Ceramic, Vulcanised Fibre, Copper, Stainless Steel, Brass
4 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
3.2 mm, 17 mm, 6.4 mm, 2.25 mm, 6.5 mm
0.7 mm, 1.2 mm, 8.1 mm, 1.1 mm, 0.8 mm
M16, M10, M5 (Form A), M6, M3
DIN 7603, ASME B18.22.1 ASTM
F844, ASME B18.22.1
ASTM F844, BS 4320G, ASME B18.8.1