Internal Tooth, Cup, Crinkle, Full Washers, Form A
Stainless Steel, Ceramic, Steel, Nylon, Brass
12 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.85 mm, 2.1 mm, 5.3 mm, 4.36 mm, 6.5 mm
0.6 mm, 1.2 mm, 0.28 mm, 3 mm, 2.2 mm
M6, M24, M5 (Form A), M4, M2.5
DIN 6798J, DIN 6797J, ASME B18.21.1, BS 4320, BS 4320B