Internal Tooth, Cup, Crinkle, Full Washers, Form A
Steel, Stainless Steel, TPE, Copper, Brass
12.5 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.85 mm, 6 mm, 2.1 mm, 2.2 mm, 6.5 mm
0.9 mm, 1.8 mm, 0.28 mm, 8.1 mm, 1.2 mm
M2, M24, M12, M5 (Form A), M5
DIN 7980, DIN 6797A, DIN 6797J, BS 4320B, BS 4463