Holes Bolts (DIN 933) Nuts Washers (DIN125A) Tapping Diameter Clearance Holes Coarse Fine Close Medium Coarse s e k D s e m plain m thin id t od Ratio 1.6D 1.8D 0.8 D 0.5D M1 0.75 1.2 1 M1.2 0.95 1.4 1.2 M1.4 1.1 1.6 1.4 M1.6 1.25 1.7 […] Nuts and Bolts