Metric Screw Dimensions ISO Fasteners - TRIBOLOGY-ABC
metric screw threads ISO 724 (DIN 13 T1) Nominal diameter d = D Pitch P root radius r pitch diameter d2=D2 minor diameter d3 D1 thread height h3 H1 drill diameter mm M 1.00 0.25 0.036 0.838 0.693 0.729 0.153 0.135 0.75 M 1.10 0.25 0 ......