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Dimensions of of No. 3 Head Plow Bolts (Round, Countersunk, Square Neck) (Inch)
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Nominal or Basic
Bolt Diameter, D [Note (1)] |
Diameter of
Full-Size Body, E |
Diameter of Head, A
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Maximum
Feed Thickness,F |
Depth of Square and Head, S
|
Width of Square, B
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Across Corners
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Maximum
Radius on Corners of Square, R [Note (2)] |
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Max.
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Min.
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Max.
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Min. Sharp
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ABS Min. With Flat
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Max.
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Min.(Basic)
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Max.
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Min.(Basic)
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Min.
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Regular Head
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5/16
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0.3125
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0.312
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0.299
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0.605
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0.578
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0.538
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0.04
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0.269
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0.228
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0.176
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0.313
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0.417
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0.031
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3/8
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0.375
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0.375
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0.36
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0.708
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0.671
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0.624
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0.05
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0.312
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0.262
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0.206
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0.375
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0.491
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0.047
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7/16
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0.4375
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0.438
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0.421
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0.826
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0.781
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0.729
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0.058
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0.364
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0.306
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0.235
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0.438
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0.58
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0.047
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1/2
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0.5
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0.5
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0.483
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0.945
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0.89
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0.831
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0.068
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0.417
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0.349
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0.265
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0.5
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0.668
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0.047
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9/16
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0.5625
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0.592
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0.544
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1.045
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1
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0.924
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0.072
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0.461
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0.389
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0.305
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0.563
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0.732
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0.078
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5/8
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0.625
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0.657
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0.606
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1.147
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1.094
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1.013
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0.08
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0.506
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0.426
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0.33
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0.625
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0.891
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0.078
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3/4
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0.75
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0.782
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0.729
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1.303
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1.25
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1.169
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0.08
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0.541
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0.461
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0.338
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0.75
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0.996
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0.078
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7/8
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0.875
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0.938
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0.853
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1.512
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1.469
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1.344
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0.1
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0.626
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0.526
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0.384
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0.875
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1.16
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0.094
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1
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1
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1.062
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0.976
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1.7
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1.656
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1.532
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0.1
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0.69
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0.59
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0.422
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1
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1.336
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0.094
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Repaire Head
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5/16
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0.3125
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0.312
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0.299
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0.556
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0.531
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0.496
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0.32
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0.232
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0.2
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0.139
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0.313
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0.417
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0.031
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3/8
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0.375
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0.375
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0.36
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0.659
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0.624
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0.584
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0.04
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0.272
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0.232
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0.166
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0.375
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0.491
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0.047
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7/16
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0.4375
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0.438
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0.421
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0.779
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0.734
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0.689
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0.048
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0.324
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0.276
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0.195
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0.438
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0.58
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0.047
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1/2
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0.5
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0.5
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0.483
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0.898
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0.843
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0.793
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0.056
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0.375
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0.319
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0.223
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0.5
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0.668
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0.047
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9/16
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0.5625
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0.592
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0.544
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1.002
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0.953
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0.882
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0.064
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0.423
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0.359
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0.267
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0.563
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0.732
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0.078
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5/8
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0.625
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0.657
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0.606
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1.096
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1.047
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0.976
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0.064
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0.458
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0.394
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0.282
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0.625
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0.819
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0.078
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3/4
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0.75
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0.782
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0.729
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1.252
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1.203
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1.132
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0.064
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0.493
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0.429
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0.29
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0.75
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0.996
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0.078
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7/8
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0.875
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0.938
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0.853
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1.465
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1.422
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1.309
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0.08
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0.573
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0.493
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0.331
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0.875
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1.16
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0.094
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1
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1
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1.062
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0.976
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1.653
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1.609
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1.497
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0.08
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0.637
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0.557
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0.369
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1
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1.336
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0.094
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GENERAL NOTE: For additional requirements, refer to section 2.
NOTES:
(1) Where specif ying the nominal size in decimals, zeros preceding the decimal and in the four th decimal place shall be omitted.
(2) This size is not recommended.
(3) The letter “R” shall be shown on top of the repair head to distinguish it from the regular head bolt.