Brass Slotted Set Screw DIN 551: d1 n min. t min. Lengths (mm) Bare Zinc S034 S035 M1 0.2 0.4 2-6 M1.2 0.2 0.4 2-6 M1.4 0.2 0.48 2-8 M1.6 0.25 0.56 2-10 M2 0.25 0.64 2-12 M2.5 0.4 0.72 2-12 M3 0.4 0.8 3-40 M3.5 0.5 0.96 4-12 M4 0.6 1.12 3-60 M5 0.8 1.28 4-80 M6 1 1.6 4-100 M8 1.2 2 6-100 M10 1.6 2.4 6-100 M12 2 2.8 8-100 M16 2.5 4 16-60 d e k s Lengths (mm) M6 11.05 4 10 16-50 M8 14.38 5.3 13 16-50 M10 18.9 6.4 17/16 20-50