5.6 Bolt Torque Chart

Tightening torque and clamp force for Class 5.6 bolts from M1.6 to M64. For example, an M8 5.6 bolt needs about 12.5 N·m (9.19 ft·lb) with dry threads.

Medium-carbon steel for moderately loaded joints, often found in older machinery and construction bolts.

Standard
Metric (ISO 898-1)
Yield strength used
300 MPa (44 ksi)
Tensile strength
500 MPa (73 ksi)
Sizes covered
M1.6 – M64
Class 5.6 — Coarse thread, tightening torque at 70% of yield
Size Threadpitch Clamp forcepreload Dryμ 0.15 Oiledμ 0.11 PTFE / moly pasteμ 0.06
M1.6 M1.6×0.350.35 mm 0.27 kN60 lbf 0.10 N·m0.07 ft·lb 0.07 N·m0.05 ft·lb 0.05 N·m0.04 ft·lb
M2 M2×0.40.4 mm 0.44 kN98 lbf 0.19 N·m0.14 ft·lb 0.15 N·m0.11 ft·lb 0.10 N·m0.07 ft·lb
M2.5 M2.5×0.450.45 mm 0.71 kN160 lbf 0.39 N·m0.29 ft·lb 0.29 N·m0.22 ft·lb 0.20 N·m0.15 ft·lb
M3 M3×0.50.5 mm 1.06 kN238 lbf 0.67 N·m0.49 ft·lb 0.50 N·m0.37 ft·lb 0.34 N·m0.25 ft·lb
M3.5 M3.5×0.60.6 mm 1.42 kN320 lbf 1.03 N·m0.76 ft·lb 0.78 N·m0.57 ft·lb 0.52 N·m0.39 ft·lb
M4 M4×0.70.7 mm 1.84 kN414 lbf 1.54 N·m1.14 ft·lb 1.16 N·m0.86 ft·lb 0.78 N·m0.58 ft·lb
M5 M5×0.80.8 mm 2.98 kN670 lbf 2.99 N·m2.21 ft·lb 2.25 N·m1.66 ft·lb 1.51 N·m1.11 ft·lb
M6 M6×11 mm 4.23 kN950 lbf 5.18 N·m3.82 ft·lb 3.90 N·m2.88 ft·lb 2.62 N·m1.93 ft·lb
M7 M7×11 mm 6.06 kN1362 lbf 8.39 N·m6.19 ft·lb 6.28 N·m4.63 ft·lb 4.17 N·m3.08 ft·lb
M8 M8×1.251.25 mm 7.69 kN1728 lbf 12.5 N·m9.19 ft·lb 9.35 N·m6.90 ft·lb 6.25 N·m4.61 ft·lb
M10 M10×1.51.5 mm 12.2 kN2738 lbf 24.4 N·m18.0 ft·lb 18.3 N·m13.5 ft·lb 12.2 N·m8.98 ft·lb
M12 M12×1.751.75 mm 17.7 kN3978 lbf 41.8 N·m30.8 ft·lb 31.3 N·m23.1 ft·lb 20.9 N·m15.4 ft·lb
M14 M14×22 mm 24.2 kN5450 lbf 66.5 N·m49.0 ft·lb 49.8 N·m36.7 ft·lb 33.1 N·m24.4 ft·lb
M16 M16×22 mm 32.9 kN7396 lbf 101.9 N·m75.1 ft·lb 75.9 N·m56.0 ft·lb 50.0 N·m36.9 ft·lb
M18 M18×2.52.5 mm 40.4 kN9087 lbf 142.3 N·m104.9 ft·lb 106.5 N·m78.5 ft·lb 70.6 N·m52.1 ft·lb
M20 M20×2.52.5 mm 51.4 kN11557 lbf 199.2 N·m146.9 ft·lb 148.4 N·m109.5 ft·lb 97.7 N·m72.0 ft·lb
M22 M22×2.52.5 mm 63.7 kN14323 lbf 271.7 N·m200.4 ft·lb 201.8 N·m148.8 ft·lb 131.8 N·m97.2 ft·lb
M24 M24×33 mm 74.0 kN16642 lbf 343.1 N·m253.0 ft·lb 255.7 N·m188.6 ft·lb 168.3 N·m124.2 ft·lb
M27 M27×33 mm 96.5 kN21688 lbf 503.6 N·m371.5 ft·lb 373.7 N·m275.6 ft·lb 243.8 N·m179.8 ft·lb
M30 M30×3.53.5 mm 117.7 kN26465 lbf 685.4 N·m505.5 ft·lb 509.4 N·m375.7 ft·lb 333.4 N·m245.9 ft·lb
M33 M33×3.53.5 mm 145.6 kN32743 lbf 922.6 N·m680.5 ft·lb 683.7 N·m504.2 ft·lb 444.7 N·m328.0 ft·lb
M36 M36×44 mm 171.5 kN38557 lbf 1189.6 N·m877.4 ft·lb 882.8 N·m651.1 ft·lb 576.1 N·m424.9 ft·lb
M39 M39×44 mm 204.9 kN46065 lbf 1533.8 N·m1131.3 ft·lb 1135.3 N·m837.4 ft·lb 736.8 N·m543.5 ft·lb
M42 M42×4.54.5 mm 235.4 kN52918 lbf 1903.5 N·m1404.0 ft·lb 1410.9 N·m1040.6 ft·lb 918.3 N·m677.3 ft·lb
M45 M45×4.54.5 mm 274.3 kN61656 lbf 2368.5 N·m1746.9 ft·lb 1751.7 N·m1292.0 ft·lb 1135.0 N·m837.1 ft·lb
M48 M48×55 mm 309.4 kN69547 lbf 2869.1 N·m2116.1 ft·lb 2124.3 N·m1566.8 ft·lb 1379.5 N·m1017.5 ft·lb
M52 M52×55 mm 369.1 kN82987 lbf 3671.3 N·m2707.8 ft·lb 2712.2 N·m2000.4 ft·lb 1753.1 N·m1293.0 ft·lb
M56 M56×5.55.5 mm 426.3 kN95837 lbf 4579.4 N·m3377.6 ft·lb 3385.0 N·m2496.7 ft·lb 2190.6 N·m1615.7 ft·lb
M60 M60×5.55.5 mm 496.0 kN111511 lbf 5661.3 N·m4175.6 ft·lb 4177.0 N·m3080.8 ft·lb 2692.7 N·m1986.0 ft·lb
M64 M64×66 mm 562.0 kN126332 lbf 6820.3 N·m5030.4 ft·lb 5036.0 N·m3714.4 ft·lb 3251.7 N·m2398.3 ft·lb
Class 5.6 — Fine thread, tightening torque at 70% of yield
Size Threadpitch Clamp forcepreload Dryμ 0.15 Oiledμ 0.11 PTFE / moly pasteμ 0.06
M1.6 M1.6×0.20.2 mm 0.33 kN74 lbf 0.11 N·m0.08 ft·lb 0.08 N·m0.06 ft·lb 0.05 N·m0.04 ft·lb
M2 M2×0.250.25 mm 0.51 kN116 lbf 0.22 N·m0.16 ft·lb 0.16 N·m0.12 ft·lb 0.11 N·m0.08 ft·lb
M2.5 M2.5×0.350.35 mm 0.78 kN175 lbf 0.42 N·m0.31 ft·lb 0.31 N·m0.23 ft·lb 0.21 N·m0.15 ft·lb
M3 M3×0.350.35 mm 1.18 kN265 lbf 0.73 N·m0.54 ft·lb 0.54 N·m0.40 ft·lb 0.35 N·m0.26 ft·lb
M3.5 M3.5×0.350.35 mm 1.66 kN373 lbf 1.16 N·m0.85 ft·lb 0.86 N·m0.63 ft·lb 0.55 N·m0.41 ft·lb
M4 M4×0.50.5 mm 2.06 kN462 lbf 1.68 N·m1.24 ft·lb 1.25 N·m0.92 ft·lb 0.82 N·m0.60 ft·lb
M5 M5×0.50.5 mm 3.39 kN761 lbf 3.30 N·m2.43 ft·lb 2.44 N·m1.80 ft·lb 1.58 N·m1.16 ft·lb
M6 M6×0.750.75 mm 4.63 kN1040 lbf 5.55 N·m4.09 ft·lb 4.13 N·m3.05 ft·lb 2.71 N·m2.00 ft·lb
M7 M7×0.750.75 mm 6.54 kN1470 lbf 8.88 N·m6.55 ft·lb 6.58 N·m4.85 ft·lb 4.28 N·m3.16 ft·lb
M8 M8×11 mm 8.23 kN1849 lbf 13.1 N·m9.67 ft·lb 9.76 N·m7.20 ft·lb 6.41 N·m4.73 ft·lb
M10 M10×1.251.25 mm 12.9 kN2889 lbf 25.4 N·m18.7 ft·lb 18.9 N·m13.9 ft·lb 12.4 N·m9.16 ft·lb
M12 M12×1.51.5 mm 18.5 kN4160 lbf 43.2 N·m31.9 ft·lb 32.2 N·m23.8 ft·lb 21.2 N·m15.6 ft·lb
M14 M14×1.51.5 mm 26.2 kN5880 lbf 70.3 N·m51.9 ft·lb 52.1 N·m38.5 ft·lb 33.9 N·m25.0 ft·lb
M16 M16×1.51.5 mm 35.1 kN7896 lbf 106.9 N·m78.8 ft·lb 78.9 N·m58.2 ft·lb 50.9 N·m37.6 ft·lb
M18 M18×1.51.5 mm 45.4 kN10208 lbf 155.1 N·m114.4 ft·lb 114.1 N·m84.2 ft·lb 73.2 N·m54.0 ft·lb
M20 M20×1.51.5 mm 57.0 kN12818 lbf 214.9 N·m158.5 ft·lb 157.8 N·m116.4 ft·lb 100.6 N·m74.2 ft·lb
M22 M22×1.51.5 mm 69.9 kN15724 lbf 291.0 N·m214.6 ft·lb 213.1 N·m157.2 ft·lb 135.2 N·m99.7 ft·lb
M24 M24×22 mm 80.7 kN18148 lbf 365.7 N·m269.7 ft·lb 269.1 N·m198.5 ft·lb 172.6 N·m127.3 ft·lb
M27 M27×22 mm 104.1 kN23404 lbf 532.6 N·m392.8 ft·lb 390.7 N·m288.2 ft·lb 248.9 N·m183.6 ft·lb
M30 M30×22 mm 130.5 kN29327 lbf 739.0 N·m545.1 ft·lb 540.9 N·m399.0 ft·lb 342.8 N·m252.9 ft·lb
M33 M33×22 mm 159.8 kN35917 lbf 986.9 N·m727.9 ft·lb 721.1 N·m531.8 ft·lb 455.2 N·m335.8 ft·lb
M36 M36×33 mm 181.6 kN40834 lbf 1240.8 N·m915.2 ft·lb 913.1 N·m673.5 ft·lb 585.3 N·m431.7 ft·lb
M39 M39×33 mm 216.0 kN48550 lbf 1593.9 N·m1175.6 ft·lb 1170.5 N·m863.3 ft·lb 747.2 N·m551.1 ft·lb
M42 M42×33 mm 253.3 kN56934 lbf 2008.2 N·m1481.2 ft·lb 1472.3 N·m1085.9 ft·lb 936.3 N·m690.6 ft·lb
M45 M45×33 mm 293.5 kN65985 lbf 2488.7 N·m1835.6 ft·lb 1821.7 N·m1343.6 ft·lb 1154.7 N·m851.7 ft·lb
M48 M48×33 mm 336.7 kN75704 lbf 3052.6 N·m2251.5 ft·lb 2231.3 N·m1645.7 ft·lb 1410.0 N·m1040.0 ft·lb
M52 M52×44 mm 383.9 kN86311 lbf 3778.1 N·m2786.6 ft·lb 2774.6 N·m2046.4 ft·lb 1771.1 N·m1306.3 ft·lb
M56 M56×44 mm 450.2 kN101216 lbf 4765.8 N·m3515.1 ft·lb 3493.7 N·m2576.8 ft·lb 2221.7 N·m1638.6 ft·lb
M60 M60×44 mm 521.8 kN117307 lbf 5873.6 N·m4332.2 ft·lb 4299.9 N·m3171.4 ft·lb 2726.1 N·m2010.7 ft·lb
M64 M64×44 mm 598.7 kN134585 lbf 7140.5 N·m5266.6 ft·lb 5220.8 N·m3850.7 ft·lb 3301.1 N·m2434.8 ft·lb

Preload is 70% of yield. Torque per ISO 16047 / VDI 2230 for standard hex heads, with the same friction μ in the threads and under the head. Click a size for wrench size, tap drill and a worked example. Always follow the manufacturer's value where one exists.

Frequently asked questions

What is the torque for an M8 5.6 bolt?

About 12.5 N·m (9.19 ft·lb) with dry threads and 9.35 N·m (6.90 ft·lb) with oiled threads (M8×1.25, 70% of yield, clamp force 7.69 kN).

What is the torque for an M10 5.6 bolt?

About 24.4 N·m (18.0 ft·lb) with dry threads and 18.3 N·m (13.5 ft·lb) with oiled threads (M10×1.5, 70% of yield, clamp force 12.2 kN).

What is the torque for an M12 5.6 bolt?

About 41.8 N·m (30.8 ft·lb) with dry threads and 31.3 N·m (23.1 ft·lb) with oiled threads (M12×1.75, 70% of yield, clamp force 17.7 kN).

Other grades

4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9 Grade 2 Grade 5 Grade 8 A307 A325 A490 A574 A2-70 A4-70 A4-80
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