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Dimensions of Flat Countersunk Head Elevator 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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Head Angle,C(Ref.)
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Max. Flat on Min. Dia. 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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Maximum Fillet Radius,R[Note(2)]
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Max.
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Min.
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Max. Edge Sharp
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Min. Edge Sharp
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Min. Edge Flat
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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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0.79
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0.75
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0.74
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9
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0.025
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0.082
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0.062
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0.21
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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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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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1.008
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0.969
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0.938
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9
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0.035
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0.098
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0.078
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0.28
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0.245
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0.219
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0.188
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0.031
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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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1.227
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1.188
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1.157
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9
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0.035
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0.114
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0.094
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0.342
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0.307
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0.25
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0.219
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0.031
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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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1.352
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1.312
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1.272
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11
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0.04
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0.145
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0.125
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0.405
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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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0.031
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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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1.477
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1.438
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1.397
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13
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0.04
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0.176
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0.156
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0.468
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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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0.031
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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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1.602
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1.562
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1.522
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12
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0.04
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0.176
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0.156
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0.53
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0.492
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0.281
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0.25
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0.047
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0.031
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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.
(2) The minimum radius is one half of the value shown.