Description:

1. Material: T2 Red copper. M8 head thickness 5.54-5.26 hexagonal opposite side 13.0-12.77. M10 head thickness 6.69-6.38 hexagonal across flats 17.0-16.72 M12 head thickness 7.79-7.41 hexagonal opposite side 19.0-18.58. M14 head thickness 9.09-8.51 hexagonal opposite side 22.0-21.16 M16 head thickness10.29-9.71 hexagonal opposite side 24-23.16.