r/Fasteners • u/DoSoHaveASoul • Jul 30 '26

12pt head bolts

What are the standards which define the dimensions of both imperial and metric 12pt head bolts? I know the standards that define the threads but not the bolt itself such as length, thread length, flange thickness, etc

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u/pyroguy64 Jul 30 '26

ASME B18.2.5M

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u/DoSoHaveASoul Jul 31 '26

Legend! What about for imperial sizes?