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Thread: 5/16 tap

  1. 17-03-2021, 09:17 PM #1
    Magnus
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    5/16 tap

    Does anyone have a 5/16x36tpi tap I could borrow by any chance? Wanting to make a couple of modified cases but seems hornady have used a most uncommon thread on the OAL gauge.
    Cursed be the ground for our sake. Both thorns and thistles it shall bring forth for us. For out of the ground we were taken, for the dust we are... and to the dust we shall return.
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  3. 17-03-2021, 09:19 PM #2
    Reloader75
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    I just ordered 2 off AliExpress, just have to wait


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  4. 17-03-2021, 09:38 PM #3
    Reloader75
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    Quote Originally Posted by mimms2 View Post
    Follow up, how did u work out it's that thread and not M8x0.75?
    Look online

    Hornady tell you it’s 5/16x36

    Trade tools will have them I’m sure


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  5. 17-03-2021, 09:54 PM #4
    Magnus
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    Quote Originally Posted by mimms2 View Post
    Follow up, how did u work out it's that thread and not M8x0.75?
    Hornady and the interwebs say its 5/16x36tpi, jus went out to garage to wave the vernier over it an thread measured 7.8 ish which is roughly 310thou damn near on 5/16 and my pitch gauge matches 36tpi. 0.75 metric pitch is way off.
    ebf and mimms2 like this.
    Cursed be the ground for our sake. Both thorns and thistles it shall bring forth for us. For out of the ground we were taken, for the dust we are... and to the dust we shall return.
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  6. 17-03-2021, 10:01 PM #5
    MSL
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    Quote Originally Posted by Magnus View Post
    Hornady and the interwebs say its 5/16x36tpi, jus went out to garage to wave the vernier over it an thread measured 7.8 ish which is roughly 310thou damn near on 5/16 and my pitch gauge matches 36tpi. 0.75 metric pitch is way off.
    Definitely 5/16thx36, have tapped a number of cases with one.


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  7. 17-03-2021, 10:12 PM #6
    ebf
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    @Magnus, I've got one, bring your cases and I will run the tap in. Prefer not to let my tooling go offsite...
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  8. 17-03-2021, 10:15 PM #7
    Magnus
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    @ebf Mate would appreciate that! I'll flick ya a pm.
    Cursed be the ground for our sake. Both thorns and thistles it shall bring forth for us. For out of the ground we were taken, for the dust we are... and to the dust we shall return.
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  9. 18-03-2021, 08:29 AM #8
    6x47
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    It's become a std procedure- soon as I've got a fired case out of a new rifle/barrel, I make a modified case with it. Will give a far more valid reading than any SAAMI-based one.
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  10. 18-03-2021, 08:40 AM #9
    zimmer
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    As an aside I no longer use the Hornady modified case method to find the lands contact point.
    Now use the Alex Wheeler "click" method.
    10-Ring likes this.
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  11. 18-03-2021, 11:14 AM #10
    zimmer
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    Just looked at my tap. It's a 5/16 - 36UNS 2B.
    Is that what others are using?
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  12. 26-03-2021, 01:47 PM #11
    10-Ring
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    Quote Originally Posted by zimmer View Post
    As an aside I no longer use the Hornady modified case method to find the lands contact point.
    Now use the Alex Wheeler "click" method.
    Yep, been using that for a while now. Very good method.
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