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Bolt Dimensions

HEX BOLT DIMENSIONS

width

Table B1
HEX BOLT DIMENSIONS

Bolt SizeA (max)BC (min)DEF
Thread Length
for Bolt Length
maxmin6" and
shorter
over 6"
1/4"0.2607/160.48411/640.030.010.7501.000
5/16"0.3241/20.5527/320.030.010.8751.125
3/8"0.3889/160.6201/40.030.011.0001.250
7/16"0.4525/80.68719/640.030.011.1251.375
1/2"0.5153/40.82611/320.030.011.2501.500
5/8"0.64215/161.03327/640.060.021.5001.750
3/4"0.7681-1/81.2401/20.060.021.7502.000
7/8"0.8951-5/161.44737/640.060.022.0002.250
1"1.0221-1/21.65343/640.090.032.2502.500
1-1/8"1.1491-11/161.8593/40.090.032.5002.750
1-1/4"1.2771-7/82.06627/320.090.032.7503.000
1-3/8"1.4042-1/162.27329/320.090.033.0003.250
1-1/2"1.5312-1/42.48010.090.033.2503.500
1-3/4"1.7852-5/82.8931-5/320.120.043.7504.000
2"2.03933.3061-11/320.120.044.2504.500
2-1/4"2.3053-3/83.7191-1/20.190.064.7505.000
2-1/2"2.5593-3/44.1331-21/320.190.065.2505.500
2-3/4"2.8374-1/84.5461-13/160.190.065.7506.000
3"3.0814-1/24.95920.190.066.2506.500
3-1/4"3.3354-7/85.3722-3/160.190.066.7507.000
3-1/2"3.5895-1/45.7862-5/160.190.067.2507.500
3-3/4"3.8585-5/86.1982-1/20.190.067.7508.000
4"4.11166.6122-11/160.190.068.2508.500

Notes:

Body Diameter - There may be a reasonable swell or fin under the head or die seam on the body not to exceed the basic bolt diameter by the following:

0.030" for sizes up to 1/2"

0.050" for sizes 5/8" and 3/4"

0.060" for sizes over 3/4" to 1-1/4"

0.090" for sizes over 1-1/4" to 2"

0.120" for sizes over 2" to 3"

0.190" for sizes over 3"

Reduced Diameter Body - Bolts may be obtained in "reduced diameter body." Where "reduced body diameter" is specified, the body diameter may be reduced to approximately the pitch diameter of the thread. A shoulder of full body diameter under the head may be supplied at option of the manufacturer.

HEAVY HEX BOLT DIMENSIONS

width

Table B2
HEAVY HEX BOLT DIMENSIONS

Bolt SizeA (max)BC (min)DEF
Thread Length
for Bolt Length
maxmin6" and
shorter
over 6"
1/2"0.5157/80.96911/320.030.011.2501.500
5/8"0.6421-1/161.17527/640.060.021.5001.750
3/4"0.7681-1/41.3831/20.060.021.7502.000
7/8"0.8951-7/161.58937/640.060.022.0002.250
1"1.0221-5/81.79643/640.090.032.2502.500
1-1/8"1.1491-13/162.0023/40.090.032.5002.750
1-1/4"1.27722.20927/320.090.032.7503.000
1-3/8"1.4042-3/162.41629/320.090.033.0003.250
1-1/2"1.5312-3/82.62210.090.033.2503.500
1-3/4"1.7852-3/43.0351-5/320.120.043.7504.000
2"2.0393-1/83.4491-11/320.120.044.2504.500
2-1/4"2.3053-1/23.8621-1/20.190.064.7505.000
2-1/2"2.5593-7/84.2751-21/320.190.065.2505.500
2-3/4"2.8274-1/44.6881-13/160.190.065.7506.000
3"3.0814-5/85.10220.190.066.2506.500

Notes:

Body Diameter - There may be a reasonable swell or fin under the head or die seam on the body not to exceed the basic bolt diameter by the following:

0.030" for sizes up to 1/2"

0.050" for sizes 5/8" and 3/4"

0.060" for sizes over 3/4" to 1-1/4"

0.090" for sizes over 1-1/4" to 2"

0.120" for sizes over 2" to 3"

Reduced Diameter Body - Bolts may be obtained in "reduced diameter body." Where "reduced body diameter" is specified, the body diameter may be reduced to approximately the pitch diameter of the thread. A shoulder of full body diameter under the head may be supplied at option of the manufacturer.

SQUARE BOLT DIMENSIONS

width

Table B3
SQUARE BOLT DIMENSIONS

Bolt SizeA (max)BC (min)DEF
Thread Length
for Bolt Length
maxmin6" and
shorter
over 6"
1/4"0.2603/80.49811/640.030.010.7501.000
5/16"0.3241/20.66513/640.030.010.8751.125
3/8"0.3889/160.7471/40.030.011.0001.250
7/16"0.4525/80.82819/640.030.011.1251.375
1/2"0.5153/40.99521/640.030.011.2501.500
5/8"0.64215/161.24427/640.060.021.5001.750
3/4"0.7681-1/81.4941/20.060.021.7502.000
7/8"0.8951-5/161.74219/320.060.022.0002.250
1"1.0221-1/21.99121/320.090.032.2502.500
1-1/8"1.1491-11/162.2393/40.090.032.5002.750
1-1/4"1.2771-7/82.48927/320.090.032.7503.000
1-3/8"1.4042-1/162.73829/320.090.033.0003.250
1-1/2"1.5312-1/42.98610.090.033.2503.500

HEX CAP SCREW DIMENSIONS

width

Table B4
HEX CAP SCREW DIMENSIONS

Bolt SizeABC (min)DF
Thread Length
for Screw Lengths
maxmin6" and
shorter
over 6"
1/4"0.25000.24507/160.4885/320.7501.000
5/16"0.31250.30651/20.55713/640.8751.125
3/8"0.37500.36909/160.62815/641.0001.250
7/16"0.43750.43055/80.6989/321.1251.375
1/2"0.50000.49303/40.8405/161.2501.500
9/16"0.56250.554513/160.91023/641.3751.625
5/8"0.62500.617015/161.05125/641.5001.750
3/4"0.75000.74101-1/81.25415/321.7502.000
7/8"0.87500.86601-5/161.46535/642.0002.250
1"1.00000.99001-1/21.67539/642.2502.500
1-1/8"1.12501.11401-11/161.85911/162.5002.750
1-1/4"1.25001.23901-7/82.06625/322.7503.000
1-3/8"1.37501.36302-1/162.27327/323.0003.250
1-1/2"1.50001.48802-1/42.4801-5/163.2503.500
1-3/4"1.75001.73802-5/82.8931-3/323.7504.000
2"2.00001.988033.3061-7/324.2504.500
2-1/4"2.25002.23803-3/83.7191-3/84.7505.000
2-1/2"2.50002.48803-3/44.1331-17/325.2505.500
2-3/4"2.75002.73804-1/84.5461-11/165.7506.000
3"3.00002.98804-1/24.9591-7/86.2506.500

HEAVY HEX STRUCTURAL BOLT DIMENSIONS

width

Table B5
HEAVY HEX STRUCTURAL BOLT DIMENSIONS

Bolt SizeABCDE
Radius of Fillet
F
Thread Length
G
Transitional
Thread Length
Runout of
Bearing Surface
FIM
maxminminmaxminmax
1/2"0.5150.4827/80.9695/160.0310.0091.000.190.016
5/8"0.6420.6051-1/161.17525/640.0620.0211.250.220.019
3/4"0.7680.7291-1/41.38315/320.0620.0211.380.250.022
7/8"0.8950.8521-7/161.58935/640.0620.0311.500.280.025
1"1.0220.9761-5/81.79639/640.0930.0621.750.310.028
1-1/8"1.1491.0981-13/162.00211/160.0930.0622.000.340.032
1-1/4"1.2771.22322.20925/320.0930.0622.000.380.035
1-3/8"1.4041.3452-3/162.41627/320.0930.0622.250.440.038
1-1/2"1.5311.4702-3/82.62215/160.0930.0622.250.440.041

Notes:

Body Diameter - There may be a reasonable swell or fin under the head or die seam on the body not to exceed the basic bolt diameter by the following:

0.030" for sizes up to 1/2"

0.050" for sizes 5/8" and 3/4"

0.060" for sizes over 3/4" to 1-1/4"

0.090" for sizes over 1-1/4"

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