Crinkle, Internal Tooth, Cup, Full Washers, Form A
Brass, Stainless Steel, Steel, TPE, Nylon
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.85 mm, 25 mm, 2.25 mm, 4.36 mm, 6.5 mm
0.16 mm, 1.8 mm, 1.2 mm, 2.5 mm, 2.2 mm
M3 (Form A), M16, M3, M5 (Form A), M2.5
ASTM F436, DIN 7980, BS 4320, BS 4320B, ASME B18.21.1