Internal Tooth, Cup, Crinkle, Full Washers, Form A
A2/304 Stainless Steel, Fibre, Brass, 301 Stainless Steel, TPE
3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 20 mm, 11.88 mm
5.3 mm, 14 mm, 5 mm, 2.25 mm, 6.5 mm
5.8 mm, 2.2 mm, 0.4 mm, 8.1 mm, 0.28 mm
M12, M5 (Form A), M16, M2.5, M2
BS 4320B, DIN 125A, BS 4320, BS 4463, DIN 7980