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Dimensions of 114-deg Countersunk Square Neck Bolts (Inch)
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Nominal Size
or Basic Bolt Diameter [Note (1)] |
Body Diameter, E
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Head Diameter, A
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Maximum Flat on Head, F
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Head Height, H
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Square Width,O
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Square Depth,P
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Maximum Corner Radius on Square,Q
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Max.
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Min.
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Max.
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Min.
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Max.
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Min.
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Max.
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Min.
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Max.
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Min.
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No.10
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0.19
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0.199
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0.182
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0.548
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0.5
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0.015
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0.131
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0.112
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0.199
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0.185
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0.125
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0.094
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0.031
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1/4
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0.25
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0.26
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0.237
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0.682
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0.625
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0.018
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0.154
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0.135
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0.26
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0.245
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0.156
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0.125
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0.031
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5/16
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0.3125
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0.324
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0.298
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0.821
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0.75
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0.023
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0.184
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0.159
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0.324
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0.307
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0.219
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0.188
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0.031
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3/8
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0.375
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0.388
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0.36
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0.96
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0.875
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0.027
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0.212
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0.183
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0.388
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0.368
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0.25
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0.219
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0.047
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7/16
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0.4375
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0.452
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0.421
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1.093
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1
|
0.03
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0.235
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0.205
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0.452
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0.431
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0.281
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0.25
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0.047
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1/2
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0.5
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0.515
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0.483
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1.233
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1.125
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0.035
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0.265
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0.229
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0.515
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0.492
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0.312
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0.281
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0.047
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5/8
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0.625
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0.642
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0.605
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1.495
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1.375
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0.038
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0.316
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0.272
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0.642
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0.616
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0.406
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0.375
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0.078
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3/4
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0.75
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0.768
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0.729
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1.754
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1.625
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0.041
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0.368
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0.314
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0.768
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0.741
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0.5
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0.469
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0.078
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GENERAL NOTE: For additional requirements, refer to section 2, General Data.
NOTES:
(1) Where specifying nominal size in decimals, zeros preceding decimal and in the four th decimal place shall be omitted..