Internal Tooth, Plain Washer, Crinkle, Full Washers, Form A
Stainless Steel, TPE, Vulcanised Fibre, Copper, Brass
3/4" X 3" X 1/4", 7.99 mm, 15.5 mm, 6.9 mm, 11.88 mm
12.2 mm, 2.2 mm, 13 mm, 4.36 mm, 6.5 mm
0.28 mm, 0.4 mm, 2.5 mm, 1.1 mm, 0.3 mm
M3 (Form A), M2, M5 (Form A), M8, M4
BS 4463, BS 4320, ASME B18.22.1
ASTM F844, BS 4320G, ASME B18.21.1