External Tooth, Internal Tooth, Cup, Full Washers, Form A
Stainless Steel, Brass, TPE, Vulcanised Fibre, Copper
28 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
2.6 mm, 4.85 mm, 17 mm, 2.1 mm, 6.5 mm
0.7 mm, 0.8 mm, 0.3 mm, 1.5 mm, 2.5 mm
M2.5, M3 (Form A), M2, M5 (Form A), M6
DIN 125A, BS 4320:1968, BS 4463, BS 4320G, BS 4320B