4, 5, 6, 6.5, 8, 10, 12, 13
2, 3, 4, 5mm
M3, 4, 5, 6, 8, 10, 12
DIN 1814, 1-1/2", M3-M12
DIN 225
M3-M8
1/2" - 20 UNF