Internal Tooth, Spring, Full Washers, Flat Washers, Form A
TPE, Vulcanised Fibre, Copper, Steel, Brass
37 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
12.2 mm, 5.36 mm, 2.25 mm, 21 mm, 6.5 mm
1.8 mm, 0.4 mm, 0.6 mm, 2.5 mm, 2 mm
M2.5, M3 (Form A), M3, M24, M5 (Form A)
ASME B18.8.1, BS 4320, BS 4320G, ASME B18.22.1
ASTM F844, BS 4320B