Technical Description of productsInformation 18. Bar diameter of external threads (for thread rolling dies) ■○NfRoeRrcSomm-DmeetnrrdiececdeobxamrtedmiarnmeeantledrtsahftorieroManSd-fRso-SrDbMainriadtuiraemexteetrnearl threads Unit:mm Unit : mm Recommended bar Major diameter of external thread size Classsize diameter recommended bar diameterMax. Min. Max Min S0M.53X×0.01.255 R2 0.410 2.64 0.500 2.620.480 S0.6X0.15 R2 0.495 0.600 0.575 S0M.74X×0.01.775 R3 0.570 3.54 0.700 3.520.675 S0M.85X×0.02.8 R3 0.655 4.40 0.800 4.380.770 S0M.96X×0.1225 R3 0.740 5.30 0.900 5.280.870 TheMm8×aj1o.r25diameters of external thre7a.1d0s are based on the to7.le0r7ance class 5h3 of JIS B 0201. ■ Recommended bar diameters for RS-D Metric external threads Unit:mm Recommended Major diameter of external thread Recommended Major diameter of external thread ○RSs-iDze recoCmlasms enbdaradtiiaomnetfeor r bar Cduiraremnt JeISter for mOeldtrJiIcS external thresaizde s Class bar diameter Current JIS Old JUISnit : mm size Current JIS Old JISrecomMamxe. ndedMbianr.diameMtearx. Min. size Current JIS Old JIS recoMmamx.endedMbina.r diamMetaexr. Min. R2 0.815 0.81M5 ax Min R2 2.01 2.01Max Min MM11×X0.25 R3 0.800 0.800.8081.000 0.933 0.09.87585 0.940 ※ MM22..33X×00.4.4 R3 2.00 2.00 1.9928.281 2.186 2.218.9068 2.190 M1.1×0.25 R4 0.780 0.7800.918 0.891 M2.3×0.25 R4 1.98 1.98 2.096 2.071 M1.2×0.25 R1 0.930 0.9310.007 0.984 M2.5×0.45 R2 2.11 2.11 2.162 2.126 MM11..41×X00..235 R2 0.915 0.9151.1681.100 1.033 1.11.01042 1.033 ※ MM22..35X×00.2.355 R3 2.09 2.09 2.2228.282 2.215 2.228.1096 2.230 M1.6×0.35 R3 0.900 0.9001.332 1.300 M2.6×0.45 R4 2.07 2.07 2.262 2.226 R2 1.015 1.015 R2 2.18 2.18 MM11..72×X00..3255 R3 0.995 0.9915.4321.200 1.133 1.11.84501 1.140 MM22..56X×00.4.355 R4 2.15 2.15 2.3128.480 2.380 2.428.0278 2.380 M1.8×0.35 R4 0.980 0.9810.530 1.498 M3×0.5 R5 2.13 2.13 2.627 2.589 M2×0.4 R2 1.180 1.1801.699 1.669 M3×0.35 R2 2.24 2.24 2.718 2.677 MM21×.40X.02.53 R3 1.165 1.1651.7961.400 1.325 1.13.87071 1.320 MM24.×5X00.5.35 R3 2.23 2.23 3.6027.481 2.396 2.438.1561 2.396 M2.2×0.45 R4 1.150 1.1451.863 1.827 M5×0.5 R4 2.21 2.21 4.606 4.560 R2 1.345 1.345 R2 2.28 2.28 M1.6X0.35 R3 1.330 1.330 1.581 1.496 1.581 1.496 ※ M2.6X0.45 R4 2.25 2.25 2.580 2.480 2.580 2.480 ○MS-RS-D reRc4om1m.31e5nda1.t3i1o5n for bar diameter R5 2.23 2.23 for miniatuRr2e ex1t.4e4r5nal 1t.h4r5e0ads Unit : mm R2 2.34 2.34 ※ M1.7X0.3si5ze R3 1.430 1.430reco1m.6m8e1nded1.b5a9r6diam1e.t6e8r 0 1.610 ※ M2.6X0.35 R4 2.31 2.31 2.581 2.496 2.580 2.480 R4 1.415 1.415Max Min R5 2.29 2.29 S0.5×0.125 R2 1.545 1.5450.410 0.396 R2 2.65 2.65 SM01.6.8×X0.1355 R3 1.530 1.530.4941.781 1.696 1.07.84179 1.696 M3X0.5 R4 2.62 2.62 2.980 2.874 2.980 2.874 S0.7×0.175 R4 1.515 1.5150.575 0.559 R5 2.60 2.60 S0.8×0.2 R2 1.715 1.7150.658 0.640 R2 2.74 2.74 SM02.9X×0.04.225 R3 1.700 1.7000.7411.981 1.886 1.09.87020 1.890 M3X0.35 R4 2.71 2.71 2.981 2.896 2.980 2.880 R4 1.680 1.680 R5 2.69 2.69 R2 1.810 1.810 R2 3.24 3.24 M2X0.25 R3 1.790 1.795 1.982 1.915 1.980 1.930 M3.5X0.35 R4 3.21 3.21 3.481 3.396 3.480 3.380 R4 1.775 1.775 R5 3.19 3.19 R2 1.88 1.88 R3 3.63 3.63 M2.2X0.45 R3 1.87 1.87 2.180 2.080 2.180 2.080 M4X0.5 R5 3.60 3.59 3.980 3.874 3.970 3.860 R4 1.85 1.85 R6 3.58 3.58 R3 4.63 4.63 ■ Recommended bar diameters for N-RSD Metric external threads Unit:mm R4 4.61 4.61M5X0.54.980 4.874 4.970 4.860R54.594.59 Recommended Major diameter of external thread R6 4.58 4.58 size Class bar diameter Current JIS Old JIS Current JIS: Tolerance class 6g (M1.6 or larger), 6h (M1.4 or smaller) Current JIS Old JIS Max. Min. Max. Min. · JIS: Class 2 M3X0.5 R4 2.62 2.62 2.980 2.874 2.980 2.874 · The column of class shows the recommended classes. M4X0.7 R4 3.49 3.49 3.978 3.838 3.978 3.838 · Nominal sizes marked with * have been removed from the current JIS. M5X0.8 R5 4.41 4.41 4.976 4.826 4.976 4.826 M6X1 R5 5.28 5.28 5.974 5.794 5.970 5.820 M8X1.25 R6 7.10 7.11 7.972 7.760 7.960 7.790 Current JIS: Tolerance class 6g Old JIS: Class 2 Technical-57