Internal Tooth, Cup, Plain Washer, Full Washers, Form A
301 Stainless Steel, TPE, Nylon, Brass, Copper
12.5 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
12.2 mm, 16.2 mm, 5.3 mm, 2.25 mm, 6.5 mm
1.4 mm, 5.8 mm, 0.4 mm, 1.8 mm, 0.7 mm
M16, M3 (Form A), M20, M24, M5 (Form A)
BS 4320C, DIN 6797J, DIN 127B, DIN 7980, BS 4320B