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ASME B18.5 TABLE 1 Standard Dimensions for Round head bolts, inch series

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Round head bolts

Dimensional Drawing and Technical Diagrams

745_vicaC8_ASME-B18.5-table1.jpg

Key Dimensions and Technical Parameters

Dimensions in inches - source ASME B18.5 Table 1

Publication date:2008
Nominal size or basic bolt Diameter E A H
Body Diameter Head Diameter Head Height
Max Min Max Min Max Min

No.10 ( 0.1900)

 0.199 0.182 0.469 0.438 0.114 0.094

1/4 (0.2500)

 0.260 0.237 0.594 0.563 0.145 0.125
5/16 (0.3125) 0.324 0.298 0.719 0.688 0.176 0.156
3/8 (0.3750) 0.388 0.360 0.844 0.782 0.208 0.188
7/16 (0.4375) 0.452 0.421 0.969 0.907 0.239 0.219
1/2 (0.5000) 0.515 0.483 1.094 1.032 0.270 0.250
5/8 (0.6250) 0.642 0.605 1.344 1.219 0.344 0.313
3/4(0.7500) 0.768 0.729 1.594 1.469 0.406 0.375
7/8 (0.8750) 0.895 0.852 1.719 1.719 0.469 0.438

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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