Spring, Cup, Lock Washer, Full Washers, Form A
301 Stainless Steel, Copper, TPE, Brass, Steel
4 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.85 mm, 21 mm, 8.4 mm, 6 mm, 6.5 mm
5.8 mm, 0.7 mm, 1.8 mm, 3.5 mm, 1.6 mm
M4, M2.5, M3 (Form A), M10, M5 (Form A)
BS 4320B, BS 4320:1968, ASME B18.8.1, BS 4320, DIN 125A