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ねじ転造を行う際の下径(素材径)表です。下記は計算値ですので、実際に転造を行う際は、事前にテストを行った上で決定して下さい。また、表にない種類のねじに関する下径はお問い合せください。
PDF形式はこちらから取得できます。

メートル並目ねじ

ねじの呼び基準有効径等級
4h6g8g
2×0.41.7401.73-1.711.70-1.67
2.2×0.451.9081.90-1.881.87-1.83
2.5×0.452.2082.20-2.182.17-2.13
3×0.62.6102.56-2.53
3×0.52.6752.67-2.642.63-2.60
3.5×0.63.1103.10-3.083.06-3.30
4×0.753.5133.46-3.42
4×0.73.5453.54-3.513.49-3.45
4.5×0.754.0134.00-3.983.96-3.92
5×0.94.415-4.36-4.31
5×0.84.4804.47-4.444.43-4.384.40-4.33
6×15.3505.34-5.315.30-5.255.28-5.21
7×16.3506.34-6.316.30-6.256.28-6.21
8×1.257.1887.18-7.147.12-7.077.10-7.03
9×1.258.1888.18-8.148.12-8.078.10-8.03
10×1.59.0269.03-8.998.97-8.918.94-8.86
11×1.510.02610.02-9.989.97-9.919.94-9.86
12×1.7510.86310.87-10.8210.79-10.7310.77-10.69
14×212.70112.71-12.6612.63-12.5612.61-12.52
16×214.70114.70-14.6514.63-14.5614.61-14.52
18×2.516.37616.39-16.3316.31-16.2316.28-16.17
20×2.518.37618.38-18.3318.31-18.2318.28-18.17
22×2.520.30620.38-20.3320.31-20.2320.28-20.17
24×322.05122.07-22.0121.98-21.9021.96-21.85
27×325.05125.06-25.0024.98-24.8924.95-24.84
30×3.527.72727.75-27.6827.66-27.5627.63-27.50
33×3.530.72730.74-30.6830.65-30.5630.62-30.50
36×433.40233.43-33.3733.33-33.2333.29-33.16
39×436.40236.43-36.3636.33-36.2336.29-36.15
42×4.539.07739.11-39.0439.01-38.9038.97-38.82
45×4.542.07742.11-42.0442.00-41.9041.96-41.82
48×544.75244.79-44.7244.68-44.5744.64-44.49
52×548.75248.78-48.7048.67-48.5448.59-48.39
56×5.552.42852.47-52.3852.34-52.2152.26-52.05
60×5.556.42856.46-56.3856.34-56.2156.26-56.05
64×660.10360.14-60.0660.02-59.8859.93-59.70
68×664.10364.14-64.0564.01-63.8763.93-63.70

メートル細目ねじ

ねじの呼び基準有効径等級
4h6g8g
3×0.352.7732.76-2.732.72-2.68
3.5×0.353.2733.26-3.233.22-3.18-
4×0.53.6753.66-3.633.61-3.57-
4.5×0.54.1754.16-4.134.11-4.07-
5×0.54.6754.66-4.634.61-4.57-
5.5×0.55.1755.16-5.135.11-5.07-
6×0.755.5135.50-5.475.45-5.41-
7×0.756.5136.50-6.476.45-6.41-
8×17.3507.34-7.307.29-7.247.72-7.20
8×0.757.5137.49-7.467.45-7.407.43-7.36
9×18.3508.34-8.308.29-8.248.27-8.20
9×0.758.5138.49-8.468.45-8.408.43-8.36
10×1.259.1889.18-9.149.12-9.079.10-9.03
10×19.3509.34-9.309.28-9.239.26-9.19
10×0.759.5139.50-9.469.45-9.40-
11×110.35010.34-10.3010.28-10.2310.26-10.19
11×0.7510.51310.50-10.4610.45-10.40-
12×1.511.02611.02-10.9710.95-10.8910.93-10.85
12×1.2511.11811.17-11.1311.12-11.0611.08-10.98
12×111.35011.33-11.2911.27-11.2111.25-11.17
14×1.513.02613.02-12.9712.95-12.8912.93-12.85
14×113.35013.34-13.3013.27-13.2113.25-13.17
15×1.514.02614.02-13.9713.95-13.8913.93-13.85
15×114.30514.33-14.2914.27-14.2114.25-14.17
16×1.515.02615.01-14.9714.95-14.8914.93-14.85
16×115.35015.33-15.2915.27-15.2115.25-15.17
17×1.516.02616.01-15.9715.96-15.8915.91-15.80
17×116.35016.33-16.2916.28-16.2216.24-16.15
18×216.70116.70-16.6516.62-16.5416.59-16.48
18×1.517.02617.01-16.9616.93-16.8616.91-16.81
18×117.35017.32-17.2817.26-17.2017.24-17.16
20×218.70118.70-18.6518.62-18.5418.59-18.48
20×1.519.02619.01-18.9618.92-18.8518.90-18.80
20×119.35019.32-19.2819.26-19.2019.24-19.16
22×220.70120.69-20.6420.61-20.5320.58-20.47
22×1.521.02621.00-20.9620.92-20.8520.90-20.80
22×121.3521.32-21.2821.26-21.2021.24-21.16
24×222.70122.69-22.6322.60-22.5222.57-22.46
24×1.523.02623.00-22.9522.92-22.8522.90-22.80
24×123.3502.333-23.2923.26-23.2023.24-23.16
25×223.70123.69-23.6323.60-23.5223.57-23.46
25×1.524.02624.00-23.9523.93-23.8523.90-23.80
25×124.35024.32-24.2824.26-24.2024.24-24.16
26×1.525.02625.00-24.9524.93-24.8524.90-24.80
27×225.70125.69-25.6425.62-25.5325.57-25.44
27×1.526.02626.00-25.9525.93-25.8525.90-25.80
27×126.35026.33-26.2926.28-26.2226.24-26.16
28×226.70126.69-26.6326.60-26.5226.57-26.46
28×1.527.02627.00-26.9526.93-26.8526.90-26.80
28×127.35027.32-27.2827.26-27.2027.24-27.16
30×328.05128.06-27.9927.97-27.8727.91-27.76
30×228.70128.68-28.6328.60-28.5228.57-28.46
30×1.529.02629.00-28.9528.93-28.8528.90-28.80
30×129.35029.32-29.2829.26-29.2029.24-29.16
32×230.70130.68-30.6330.59-30.5130.56-30.45
32×1.531.02631.00-30.9530.93-30.8530.90-30.80
33×331.05131.05-30.9930.97-30.8730.91-30.75
33×231.70131.69-31.6331.62-31.5331.57-31.44
33×1.532.02632.00-31.9531.93-31.8531.90-31.79
35×1.534.02634.00-33.9533.93-33.8533.90-33.79
36×334.05134.05-33.9933.97-33.8733.91-33.75
36×234.70134.68-34.6334.59-34.5134.56-34.45
36×1.535.02635.00-34.9534.93-34.8534.90-34.79
38×1.537.02637.00-36.9536.93-36.8536.90-36.79
39×337.05137.05-36.9936.96-36.8636.91-36.75
39×237.70137.68-37.6337.61-37.5337.56-37.43
39×1.538.02638.01-37.9637.94-37.8737.90-37.78
40×338.05138.05-37.9937.96-37.8637.90-37.75
40×238.70138.68-38.6338.59-38.5138.56-38.45
40×1.539.02639.00-38.9538.93-38.8538.90-38.79
42×439.40239.42-39.3539.32-39.2139.25-39.08
42×340.05140.05-39.99939.96-39.8639.90-39.75
42×240.70140.68-40.6240.59-40.5140.56-40.44
42×1.541.02641.00-40.9540.93-40.8540.90-40.79
45×442.40242.42-42.3542.32-42.2042.25-42.07
45×343.05143.05-42.9842.96-42.8642.90-42.75
45×243.70143.68-43.6343.59-43.5143.56-43.44
45×1.544.02644.00-43.9543.93-43.8543.90-43.79
48×445.40245.41-45.3445.31-45.1945.24-45.05
48×346.05146.04-45.9845.95-45.8545.89-45.72
48×246.70146.68-46.6246.59-46.5046.56-46.44
48×1.547.02647.00-46.9546.93-46.8546.90-46.79
50×348.05148.04-47.9847.95-47.8547.89-47.72
50×248.70148.68-48.6248.59-48.5048.56-48.44
50×1.549.02649.00-48.9548.92-48.8548.89-48.79