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DIN 912 — Metric Socket Head Cap Screws

DIN 912

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DIN 912 — Dimension drawing
DIN 912 — Dimension drawing

Dimensions & mechanical properties

Thread nom.PitchmmA max.mmD max.mmH max.mmJ nom.mmG min.mmT min.mmUTS min.MPaTensile min.kNTensile min.lbs.Shear min.kNShear min.lbs.Torque**N-mTorque**in-lbs.
M1.60.353.01.61.61.50.540.8013001.653701.57352.50.292.6
M20.403.82.02.01.50.681.013002.696052.455500.605.3
M2.50.454.52.52.52.00.851.2513004.419903.838601.2111
M30.55.53.03.02.51.021.513006.541,4705.512402.119
M40.77.04.04.03.01.522.0130011.42,5609.82,2054.641
M50.88.55.05.04.01.902.5130018.54,16015.33,4459.585
M61.010.06.06.05.02.283.0130026.15,87022.054,96016140
M81.2513.08.08.06.03.24.0130047.610,70039.28,80039350
M101.516.010.010.08.04.05.0130075.417,0006113,75077680
M121.7518.012.012.010.04.86.0130011024,7008819,8501351,200
*(M14)2.021.014.014.012.05.67.0130015033,70012027,0002151,900
M162.024.016.016.014.06.48.0130020445,90015735,2503302,900
M202.530.020.020.017.08.010.0125030668,800235.553,0006505,750
M243.036.024.024.019.09.612.0125044199,10033976,50011009,700
*M303.545.030.030.022.012.015.01250701158,000530119,000225019,900
*M364.054.036.036.027.014.418.012501020229,000756171,500385034,100
*M424.563.042.042.032.016.821.012501400315,0001040233,500627055,580
*M485.072.048.048.036.019.224.012501840413,0001355305,000856075,800

Length tolerance

Nominal lengthM1.6-M10mmM12-M20mmover 20mm
Up to 16 incl.±0.3±0.3-
Over 16-50 incl.±0.4±0.4±0.7
Over 50-120 incl.±0.7±1.0±1.5
Over 120-200 incl.±1.0±1.5±2.0
Over 200±2.0±2.5±3.0

Body and Grip Lengths

Nominal lengthmmM1.6 LG max.mmM1.6 LB min.mmM2 LG max.mmM2 LB min.mmM2.5 LG max.mmM2.5 LB min.mmM3 LG max.mmM3 LB min.mmM4 LG max.mmM4 LB min.mmM5 LG max.mmM5 LB min.mmM6 LG max.mmM6 LB min.mmM8 LG max.mmM8 LB min.mmM10 LG max.mmM10 LB min.mmM12 LG max.mmM12 LB min.mmM14 LG max.mmM14 LB min.mmM16 LG max.mmM16 LB min.mmM20 LG max.mmM20 LB min.mmM24 LG max.mmM24 LB min.mm
204.83.04.02.0
259.88.09.07.08.05.77.04.5
3014.813.014.012.013.010.712.09.510.06.5
35. . .. . .19.017.018.015.717.014.515.011.513.09.011.06.0
40. . .. . .24.022.023.020.722.019.520.016.518.014.016.011.0
45. . .. . .. . .. . .28.025.727.024.525.021.523.019.021.016.017.010.7
50. . .. . .. . .. . .33.030.732.029.530.026.528.024.026.021.022.015.718.010.5
55. . .. . .. . .. . .. . .. . .37.034.535.031.533.029.031.026.027.020.723.015.5
60. . .. . .. . .. . .. . .. . .42.039.540.036.538.034.036.031.032.025.728.020.524.015.2
65. . .. . .. . .. . .. . .. . .47.044.545.041.543.039.041.036.037.030.733.025.529.020.225.015.0
70. . .. . .. . .. . .. . .. . .. . .. . .50.046.548.044.046.041.042.035.738.030.534.025.230.020.026.016.0
80. . .. . .. . .. . .. . .. . .. . .. . .60.056.558.054.056.051.052.045.748.040.544.035.240.030.036.026.0
90. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .68.064.066.061.062.055.758.050.554.045.250.040.046.036.038.025.5
100. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .78.074.076.071.072.065.768.060.564.055.260.050.056.046.048.035.540.025.0
110. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .86.081.082.075.778.070.574.065.270.060.066.056.058.045.550.035.0
120. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .96.091.092.085.788.080.584.075.280.070.076.066.068.055.560.045.0
130. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .102.095.798.090.594.085.290.080.086.076.078.065.570.055.0
140. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .112.0105.7108.0100.5104.095.2100.090.096.086.088.075.580.065.0
150. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .122.0115.7118.0110.5114.0105.2110.0100.0106.096.098.085.590.075.0
160. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .132.0125.7128.0120.5124.0115.2120.0110.0116.0106.0108.095.5100.085.0
180. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .148.0140.5144.0135.2140.0130.0136.0126.0128.0115.5120.0105.0
200. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .168.0160.5164.0155.2160.0150.0156.0146.0148.0135.5140.0125.0
220. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .184.0175.2180.0170.0176.0166.0168.0155.5160.0145.0
240. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .204.0195.2200.0190.0196.0186.0188.0175.5180.0165.0
260. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .220.0210.0216.0206.0208.0195.5200.0185.0
300. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .256.0246.0248.0235.5240.0225.0

Socket Head Cap Screws (Metric Series) per ASME/ANSI B18.3.1M-1986.

Hardness: Rc 38-43

Tensile stress: 1300 MPa thru M16; 1250 MPa over M16

Yield stress: 1170 MPa thru M16; 1125 MPa over M16

Thread Class: 4g 6g

All dimensions in millimeters. Sizes in brackets not preferred for new designs. * Non-stock diameter.

** Recommended seating torque, plain finish: calculated in accordance with VDI 2230, “Systematic Calculation of High Duty Bolted Joints,” to induce approximately 800 MPa stress in screw threads. Values are for plain screws. Additional torque conditions are unavailable; do not treat these values as universal installation torque.

Sheet revision 03 · 2026-09-16

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