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O/T Tech adice please......

Discussion in 'Uncategorized Threads' started by 3dram8, Aug 29, 2007.

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  1. 3dram8

    3dram8 Member

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    O/T Tech advice please......

    Would someone be kind enough to tell me what size drill bit I need to pre-drill a hole in steel prior to running a 3/8-16 tap into the hole? Thank you for the help! ......Rick
     
  2. revsublime

    revsublime TS Member

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    I believe it's a 5/16 drill bit you want.
     
  3. zzt

    zzt Well-Known Member

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    That's a roger for 75% threads. Above is a link to a calculator for different thread percentages.
     
  4. whiz white

    whiz white Strong Supporter of Trapshooting Banned

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    5/16" is correct ... 0.310 hole.

    Whiz
     
  5. revsublime

    revsublime TS Member

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    hehe..wouldnt that be a .3125 hole? ;)
     
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