Internal Tooth, Plain Washer, Cup, Full Washers, Form A
Steel, Stainless Steel, Brass, TPE, Nylon
9.09 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.85 mm, 2.1 mm, 11 mm, 12.2 mm, 6.5 mm
8.1 mm, 0.5 mm, 2.5 mm, 0.8 mm, 0.28 mm
M3, M10, M24, M16, M5 (Form A)
BS 4320, DIN 6797A, DIN 6798J, BS 4320B, DIN 125A