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Thread: threading a hole 8-32

  1. #1
    Join Date
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    threading a hole 8-32

    what is the diameter of a hole need to be to properly thread it 8-32?

    thankyou,
    KNM.
    My sydarm weighs less than yours!!!

  2. #2
    Join Date
    Feb 2011
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    PHX, AZ
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    would finding out wat size a #29 drill bit is answer this? thats the drill bit that came with my 8-32 tap? but it just says #29….no actual hole diameter? maybe there is a guide for shNit like this…if you find that there is a guide will ya post it up?

  3. #3
    this page is where i go when i need tap and drill info. http://www.physics.ncsu.edu/pearl/Tap_Drill_Chart.html

    a #29 drill is .1360

  4. #4
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    thanks big Dawg!!

  5. #5
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    thankyou,

    but I don't see and related threading guide for this application.

  6. #6
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    Oct 2006
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    Quote Originally Posted by knownothingmags View Post
    thankyou,

    but I don't see and related threading guide for this application.
    Left column is the number (8), number of threads per inch is 32 (within the #8 row).

    Notice that the drill is a little larger for stainless, iron, and plain steel. That lets you cut a little less thread depth, which is friendly for your tap.

  7. #7
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    Quote Originally Posted by Spider-TW View Post
    Left column is the number (8), number of threads per inch is 32 (within the #8 row).

    Notice that the drill is a little larger for stainless, iron, and plain steel. That lets you cut a little less thread depth, which is friendly for your tap.
    ahh gotcha.

    people has explained it to me many times, I just cant seem to get it to stick.

    thankyou again.

  8. #8
    Join Date
    Jan 2001
    Location
    Cottonwood, Az.
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    5,668
    This is the one I use for drilling, tapping and just basic drill size info for design.
    http://torchmate.com/images/uploads/..._tap_sizes.pdf

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