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Screw Data

DRILL AND COUNTERBORE SIZES FOR SOCKET HEAD CAP SCREWS
COUNTERBORE SIZES TABLE 17556 image002 
Nominal Size or Basic Screw Diameter Nominal Drill Size  
Close Fit Normal Fit  
Number or Fractional Size Decimal Size Number or Fractional Size Decimal Size Counterbore Diameter Countersink Diameter
A B C
0         0.0600 51     0.067 49     0.073 1/8 0.074
1         0.0730 46     0.081 43     0.089 5/32 0.087
2         0.0860 3/32 0.094 36     0.106 3/16 0.102
3         0.0990 36     0.106 31     0.120 7/32 0.115
4         0.1120 1/8 0.125 29     0.136 7/32 0.130
5         0.1250 9/64 0.141 23     0.154 1/4 0.145
6         0.1380 23     0.154 18     0.170 9/32 0.158
8         0.1640 15     0.180 10     0.194 5/16 0.188
10       0.1900 5     0.206 2     0.221 3/8 0.218
1/4       0.2500 17/64 0.266 9/32 0.281 7/16 0.278
5/16     0.3125 21/64 0.328 11/32 0.344 17/32 0.346
3/8       0.3750 25/64 0.391 13/32 0.406 5/8 0.415
7/16     0.4375 29/64 0.453 15/32 0.469 23/32 0.483
1/2       0.5000 33/64 0.516 17/32 0.531 13/16 0.552
5/8       0.6250 41/64 0.641 21/32 0.656 1     0.689
3/4       0.7500 49/64 0.766 25/32 0.781 1 3/16 0.828
7/8       0.8750 57/64 0.891 29/32 0.906 1 3/8 0.963
1         1.0000 1 1/64 1.016 1 1/32 1.031 1 5/8 1.100
1 1/4   1.2500 1 9/32 1.281 1 5/16 1.312 2     1.370
1 1/2   1.5000 1 17/32 1.531 1 9/16 1.562 2 3/8 1.640
1 3/4   1.7500 1 25/32 1.781 1 13/16 1.812 2 3/4 1.910
2         2.0000 2 1/32 2.031 2 1/16 2.062 3 1/8 2.180

 

 

STANDARD SOCKET HEAD CAP SCREWS
standardsocketcap
  Nominal Size Body Diameter Head Diameter Head Height Hex. Socket Size Fillet Ext.

Key Engage-
ment

  
Max Min Max Min Max Min Nom Max
D A H J F T
0 0.0600 0.0568 0.096 0.091 0.060 0.057 0.050 0.007 0.025
1 0.0730 0.0695 0.180 0.112 0.073 0.070 1/16   0.062 0.007 0.031
2 0.0860 0.0822 0.140 0.134 0.086 0.083 5/64   0.078 0.008 0.038
3 0.0990 0.0949 0.161 0.154 0.099 0.095 5/64   0.078 0.008 0.044
4 0.1120 0.1075 0.183 0.176 0.112 0.108 3/32   0.094 0.009 0.051
5 0.1250 0.1202 0.205 0.198 0.125 0.121 3/32   0.094 0.010 0.057
6 0.1380 0.1329 0.226 0.218 0.138 0.134 7/64   0.109 0.010 0.064
8 0.1640 0.1585 0.270 0.262 0.164 0.159 9/64   0.141 0.012 0.077
10 0.1900 0.1840 0.312 0.303 0.190 0.185 5/32   0.156 0.014 0.090
1/4 0.2500 0.2435 0.375 0.365 0.250 0.244 3/16   0.188 0.014 0.120
5/16 0.3125 0.3053 0.469 0.457 0.312 0.306 1/4     0.250 0.017 0.151
3/8 0.3750 0.3678 0.562 0.550 0.375 0.368 5/16   0.312 0.020 0.182
7/16 0.4375 0.4294 0.656 0.642 0.438 0.430 3/8     0.375 0.023 0.213
1/2 0.5000 0.4919 0.750 0.735 0.500 0.492 3/8     0.375 0.026 0.245
5/8 0.6250 0.6163 0.938 0.921 0.625 0.616 1/2     0.500 0.032 0.307
3/4 0.7500 0.7406 1.125 1.107 0.750 0.740 5/8       0.625 0.039 0.370
7/8 0.8750 0.8647 1.312 1.293 0.875 0.864 3/4     0.750 0.044 0.432
1     1.0000 0.9886 1.500 1.479 1.000 0.988 3/4     0.750 0.050 0.495
1 1/8 1.1250 1.1086 1.688 1.665 1.125 1.111 7/8     0.875 0.055 0.557
1 1/4 1.2500 1.2336 1.875 1.852 1.250 1.236 7/8       0.875 0.060 0.620
1 3/8 1.3750 1.3568 2.062 2.038 1.375 1.360 1         1.000 0.065 0.682
1 1/2 1.5000 1.4818 2.250 2.224 1.500 1.485 1         1.000 0.070 0.745
1 3/4 1.7500 1.7295 2.625 2.597 1.750 1.764 1 1/4    1.250 0.080 0.870
2   2.0000 1.9780 3.000 2.970 2.000 1.983 1 1/2   1.500 0.090 0.995
2 1/4 2.2500 2.2280 3.375 3.344 2.250 2.232 1 3/4     1.750 0.100 1.120
2 1/2 2.5000 2.4762 3.750 3.717 2.500 2.481 1 3/4   1.750 0.110 1.245
2 3/4 2.7500 2.7262 4.125 4.090 2.750 2.730 2         2.000 0.120 1.370
3   3.0000 2.9762 4.500 4.464 3.000 2.979 2 1/4   2.250 0.130 1.495
3 1/4 3.2500 3.2262 4.875 4.837 3.250 3.228 2 1/4   2.250 0.140 1.620
3 1/2 3.5000 3.4762 5.250 5.211 3.500 3.478 2 3/4   2.750 0.150 1.745
3 3/4 3.7500 3.7262 5.625 5.584 3.750 3.727 2 3/4   2.750 0.160 1.870
4   4.0000 3.9762 6.000 5.958 4.000 3.976 3         3.000 0.170 1.995

 

STANDARD BUTTON HEAD CAP SCREWS
standardbuttonheads
Screw Size D A J S H
#4 0.112 0.213 0.0625 0.015 0.059
#6 0.138 0.262 0.078125 0.015 0.073
#8 0.164 0.312 0.09375 0.015 0.087
#10 0.19 0.361 0.125 0.02 0.101
1/4 0.25 0.437 0.15625 0.031 0.132
5/16 0.3125 0.547 0.1875 0.031 0.166
3/8 0.375 0.656 0.21875 0.031 0.199
1/2 0.5 0.875 0.3125 0.046 0.265
5/8 0.625 1 0.375 0.062 0.331

 

STANDARD HEX HEAD BOLTS
standardhex
Bolt Size Thread Diameter Head Width Head Height
  A B C
1/4 0.250 0.438 0.156
5/16 0.313 0.500 0.203
3/8 0.375 0.562 0.234
7/16 0.438 0.625 0.281
1/2 0.500 0.750 0.323
9/16 0.563 0.813 0.359
5/8 0.625 0.938 0.391
3/4 0.750 1.125 0.483
7/8 0.875 1.313 0.547
1     1.000 1.500 0.609

 

STANDARD SOCKET FLAT HEAD CAP SCREWS
standardsocketflathead
Nominal Size Body
Diameter		 Head
Diameter		 Head Height Hexagon Socket Size
Theo-retical Sharp Abs.
Min.		 Reference
Max Min Max Nom.
D A H J
0     0.0600 0.0568 0.138 0.117 0.044 0.035
1     0.0730 0.0695 0.168 0.143 0.054 0.050
2     0.0860 0.0822 0.197 0.168 0.064 0.050
3     0.0990 0.0949 0.226 0.193 0.073 1/16
4     0.1120 0.1075 0.255 0.218 0.083 1/16
5     0.1250 0.1202 0.281 0.240 0.090 5/64
6     0.1380 0.1329 0.307 0.263 0.097 5/64
8     0.1640 0.1585 0.359 0.311 0.112 3/32
10     0.1900 0.1840 0.411 0.359 0.127 1/8
1/4 0.2500 0.2435 0.531 0.480 0.161 5/32
5/16 0.3125 0.3053 0.656 0.600 0.198 3/16
3/8 0.3750 0.3678 0.781 0.720 0.234 7/32
7/16 0.4375 0.4294 0.844 0.781 0.234 1/4
1/2 0.5000 0.4919 0.938 0.872 0.251 5/16
5/8 0.6250 0.6163 1.188 1.112 0.324 3/8
3/4 0.7500 0.7406 1.438 1.355 0.396 1/2
7/8 0.8750 0.8647 1.688 1.604 0.468 9/16
1     1.0000 0.9886 1.938 1.841 0.540 5/8
1 1/8 1.1250 1.1086 2.188 2.079 0.611 3/4
1 1/4 1.2500 1.2336 2.438 2.316 0.683 7/8
1 3/8 1.3750 1.3568 2.688 2.553 0.755 7/8
1 1/2 1.5000 1.4818 2.938 2.791 0.827 1    

 

STANDARD SHOULDER SCREWS
standardshoulder
Nominal Size Shoulder
Diameter		 Head
Diameter		 Head
Height		 Head
Side
Height		 Nominal Thread Size Thread
Length
Max Min Max Min Max Min Min
D A H S D E
1/4 0.2480 0.2460 0.375 0.357 0.188 0.177 0.157 10 - 24 0.375
5/16 0.3105 0.3085 0.438 0.419 0.219 0.209 0.183 1/4 - 20 0.438
3/8 0.3730 0.3710 0.562 0.543 0.250 0.240 0.209 5/16 - 18 0.500
1/2 0.4980 0.4960 0.750 0.729 0.312 0.302 0.262 3/8 - 16 0.625
5/8 0.6230 0.6210 0.875 0.853 0.375 0.365 0.315 1/2 - 13 0.750
3/4 0.7480 0.7460 1.000 0.977 0.500 0.490 0.421 5/8 - 11 0.875
1     0.9980 0.9960 1.312 1.287 0.625 0.610 0.527 3/4 - 10 1.000
1 1/4 1.2480 1.2460 1.750 1.723 0.750 0.735 0.633 7/8 -   9 1.125
1 1/2 1.4980 1.4960 2.125 2.095 1.000 0.980 0.842 1 1/8 -   7 1.500
1 3/4 1.7480 1.7460 2.375 2.345 1.125 1.105 0.948 1 1/4 -   7 1.750
2     1.9980 1.9960 2.750 2.720 1.250 1.230 1.054 1 1/2 -   6 2.000
Nominal Size Thread Neck
Diameter		 Thread Neck Width Shoulder Neck Diameter Shoulder Neck Width Thread
Neck
Fillet		 Head Fillet Extension Above D Hexagon Socket Size
Max Min Max Min Max Max Min Max Nom
G I K F N M J
1/4 0.142 0.133 0.083 0.227 0.093 0.023 0.017 0.014 1/8
5/16 0.193 0.182 0.100 0.289 0.093 0.028 0.022 0.017 5/32
3/8 0.249 0.237 0.111 0.352 0.093 0.031 0.025 0.020 3/16
1/2 0.304 0.291 0.125 0.477 0.093 0.035 0.029 0.026 1/4
5/8 0.414 0.397 0.154 0.602 0.093 0.042 0.036 0.032 5/16
3/4 0.521 0.502 0.182 0.727 0.093 0.051 0.045 0.039 3/8
1     0.638 0.616 0.200 0.977 0.125 0.055 0.049 0.050 1/2
1 1/4 0.750 0.726 0.222 1.227 0.125 0.062 0.056 0.060 5/8
1 1/2 0.964 0.934 0.286 1.478 0.125 0.072 0.066 0.070 7/8
1 3/4 1.089 1.059 0.286 1.728 0.125 0.072 0.066 0.080 1    
2     1.307 1.277 0.333 1.978 0.125 0.102 0.096 0.090 1 1/4

 

METRIC BUTTON HEAD CAP SCREW
metricbuttonheads
Screw Size D A J S H
M3 3 5.7 2 0.38 1.65
M4 4 7.6 2.5 0.38 2.2
M5 5 9.5 3 0.5 2.75
M6 6 10.5 4 0.8 3.3
M8 8 14 5 0.8 4.4
M10 10 17.5 6 0.8 5.5
M12 12 21 8 0.8 6.6

 

 

METRIC FLAT SOCKET CAP SCREW
metricflatheads
Screw Size C A B
M3 3 6.72 2
M4 4 8.96 2.5
M5 5 11.2 3
M6 6 13.44 4
M8 8 17.92 5
M10 10 22.4 6
M12 12 26.88 8
M16 16 33.6 10
M20 20 40.32 12

 

METRIC HEX HEAD BOLT
metricflexheads
Bolt Size A B C
M4 4 7 2.8
M5 5 8 3.5
M6 6 10 4
M7 7 11 4.8
M8 8 13 5.3
M10 10 17 6.4
M12 12 19 7.5
M14 14 22 8.8
M16 16 24 10
M20 20 30 12.5
M24 24 36 15

 

Metric Socket Head Cap Screws 
metricsocketheads
Nom. Size and Thread Pitch Body Diameter
D		 Head Diameter
A		 Head Height
H		 Chamfer or Radius
S		 Hexagon Socket Size
J

Key Engage-
ment
T
Max Min Max Min Max Min Max Nom Min
M1.6 X 0.35 1.60 1.46 3.00 2.87 1.60 1.52 0.16 1.5 0.80
M2 X 0.4 2.00 1.86 3.80 3.65 2.00 1.91 0.20 1.5 1.00
M2.5 X 0.45 2.50 2.36 4.50 4.33 2.50 2.40 0.25 2.0 1.25
M3 X 0.5 3.00 2.86 5.50 5.32 3.00 2.89 0.30 2.5 1.50
M4 X 0.7 4.00 3.82 7.00 6.80 4.00 3.88 0.40 3.0 2.00
M5 X 0.8 5.00 4.82 8.50 8.27 5.00 4.86 0.50 4.0 2.50
M6 X 1 6.00 5.82 10.00 9.74 6.00 5.85 0.60 5.0 3.00
M8 X 1.25 8.00 7.78 13.00 12.70 8.00 7.83 0.80 6.0 4.00
M10 X 1.5 10.00 9.78 16.00 15.67 10.00 9.81 1.00 8.0 5.00
M12 X 1.75 12.00 11.73 18.00 17.63 12.00 11.79 1.20 10.0 6.00
M14 X 2 14.00 13.73 21.00 20.60 14.00 13.77 1.40 12.0 7.00
M16 X 2 16.00 15.73 24.00 23.58 16.00 15.76 1.60 14.0 8.00
M20 X 2.5 20.00 19.67 30.00 29.53 20.00 19.73 2.00 17.0 10.00
M24 X 3 24.00 23.67 36.00 35.48 24.00 23.70 2.40 19.0 12.00
M30 X 3.5 30.00 29.67 45.00 44.42 30.00 29.67 3.00 22.0 15.00
M36 X 4 36.00 35.61 54.00 53.37 36.00 35.64 3.60 27.0 18.00
M42 X 4.5 42.00 41.61 63.00 62.31 42.00 41.61 4.20 32.0 21.00
M48 X 5 48.00 47.61 72.00 71.27 48.00 47.58 4.80 36.0 24.00

 

 
About Us

Advanced Integrated Technologies is essentially a manufacturing service company with two major divisions. The resistance welding and reflow soldering tool division grew out of our early work building micro tools for Hughes Aircraft. About the time that Microsoft was turning computers into a household item, computer hardware manufacturers were looking for companies to build reflow tools used in the assembly of hard drives and other components.

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