No.2 = screw dia. 2.2mm, head dia. 4.2mm, head height 1.8mm.
No.4 = screw dia. 2.9mm, head dia. 5.6mm, head height 1.2mm.
No.6 = screw dia. 3.5mm, head dia. 6.9mm, head height 2.6mm.
No.8 = screw dia. 4.2mm, head dia. 8.2mm, head height 3.05mm.
No.10 = screw dia. 4.8mm, head dia. 9.5mm, head height 3.55mm.
No.12 = screw dia. 5.5mm, head dia. 10.8mm, head height 3.95mm.
No.14 = screw dia. 6.3mm, head dia. 12.5mm, head height 4.55mm.