Crinkle, Internal Tooth, Cup, Full Washers, Form A
A2/304 Stainless Steel, Fibre, Copper, TPE, Brass
12 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
17 mm, 4.85 mm, 13 mm, 5.3 mm, 6.5 mm
2 mm, 3 mm, 1.1 mm, 0.16 mm, 0.28 mm
M16, M3, M5 (Form A), M5, M2
BS 4320G, DIN 127B, ASME B18.22.1 ASTM
F844, DIN 7603A, BS 4320