18. Bar diameter of external threads (for thread rolling dies) NRS-D recommendation for bar diameter Production data for metric external threads Unit : mm size recommended bar diameter Max. Min. M3×0.5 2.64 2.62 M4×0.7 3.54 3.52 M5×0.8 4.40 4.38 M6×1 5.30 5.28 M8×1.25 7.10 7.07 RS-D recommendation for bar diameter for metric external threads Unit : mm size recommended bar diameter size recommended bar diameter Max. Min. Max. Min. M1×0.25 0.808 0.785 M2.3×0.4 1.998 1.968 M1.1×0.25 0.918 0.891 M2.3×0.25 2.096 2.071 M1.2×0.25 1.007 0.984 M2.5×0.45 2.162 2.126 M1.4×0.3 1.168 1.142 M2.5×0.35 2.228 2.196 M1.6×0.35 1.332 1.300 M2.6×0.45 2.262 2.226 M1.7×0.35 1.432 1.401 M2.6×0.35 2.318 2.278 M1.8×0.35 1.530 1.498 M3×0.5 2.627 2.589 M2×0.4 1.699 1.669 M3×0.35 2.718 2.677 M2×0.25 1.796 1.771 M4×0.5 3.607 3.561 M2.2×0.45 1.863 1.827 M5×0.5 4.606 4.560 MS-RS-D recommendation for bar diameter for miniature external threads Unit : mm size recommended bar diameter Max. Min. S0.5×0.125 0.410 0.396 S0.6×0.15 0.494 0.479 S0.7×0.175 0.575 0.559 S0.8×0.2 0.658 0.640 S0.9×0.225 0.741 0.720 Information Technical Technical-50 821