Internal Tooth, Spring, Plain Washer, Full Washers, Form A
TPE, Nylon, Steel, Copper, Brass
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
13 mm, 10.5 mm, 5.36 mm, 21 mm, 6.5 mm
1 mm, 0.6 mm, 8.1 mm, 2.5 mm, 0.28 mm
M16, M3 (Form A), M5 (Form A), M2, M4
DIN 6797A, BS 4320:1968, ASTM F436, DIN 7603A, BS 4320B