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Tap Size

Discussion in 'Tech Tips & Tech Support' started by instro84, Aug 11, 2017.

  1. instro84

    instro84 Well-Known Member

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    need to clean up head bolt holes on a block anyone know the tap size?
     
  2. TTA984

    TTA984 Gold Member

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    7/16-14 are head bolt thread
     
  3. dvernst

    dvernst Well-Known Member

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    I think a lot of the other holes are 3/8-20. If this is incorrect please post back.
    Thanks
    Dave
     

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