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Thread: Help needed - what is this muzzle thread?

  1. #1
    Member 300_BLK's Avatar
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    Help needed - what is this muzzle thread?

    Unknown thread on a 300 BLK

    Not 5/8x24.

    Name:  IMG_20180630_173348.jpg
Views: 195
Size:  2.38 MB

    Name:  IMG_20180630_173311.jpg
Views: 198
Size:  2.82 MB
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  2. #2
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    Measure the threads only, peak to peak, or trough to trough, not to the shoulder. Do it over the greatest span of threads you can.
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  3. #3
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    who's the manufacturer ?

  4. #4
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    oversized 16x1 ?..........

  5. #5
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    Quote Originally Posted by gadgetman View Post
    Measure the threads only, peak to peak, or trough to trough, not to the shoulder. Do it over the greatest span of threads you can.
    Over the greatest span 11.4 - 12mm

    between a thread .90mm
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  6. #6
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    Quote Originally Posted by gonetropo View Post
    who's the manufacturer ?
    Bergara but has been shortened and threaded hence it is not the factory 5/8x24
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  7. #7
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    Quote Originally Posted by 300_BLK View Post
    Over the greatest span 11.4 - 12mm

    between a thread .90mm
    Over how many threads? 12mm over 12 threads would be 16x1 if its not that then could be anything especially if done by a home gamer.
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  8. #8
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    Quote Originally Posted by 300_BLK View Post
    Over the greatest span 11.4 - 12mm

    between a thread .90mm
    Looking at the photo you'd be looking at a bit over 11mm over a bit over 11 threads which would be more like 1mm pitch. I'd guess as @scotty said above.
    There are only three types of people in this world. Those that can count, and those that can't!

  9. #9
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    Quote Originally Posted by veitnamcam View Post
    Over how many threads? 12mm over 12 threads would be 16x1 if its not that then could be anything especially if done by a home gamer.
    Quote Originally Posted by gadgetman View Post
    Looking at the photo you'd be looking at a bit over 11mm over a bit over 11 threads which would be more like 1mm pitch. I'd guess as @scotty said above.
    12mm over 12 threads so I guess 16x1 is the winner?
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  10. #10
    Almost literate. veitnamcam's Avatar
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    Quote Originally Posted by 300_BLK View Post
    12mm over 12 threads so I guess 16x1 is the winner?
    Looks like it....in your photo it almost looks like the the thread is tapered? or maybe just a trick of the camera.
    Regardless if 11mm=11 threads and 12mm = 12 threads it will be 1mm pitch.
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  11. #11
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    Thanks @veitnamcam & @gadgetman
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  12. #12
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    Quote Originally Posted by veitnamcam View Post
    Looks like it....in your photo it almost looks like the the thread is tapered? or maybe just a trick of the camera.
    Regardless if 11mm=11 threads and 12mm = 12 threads it will be 1mm pitch.
    Ohhh how classic would pipe threads be on a barrel
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  13. #13
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    Quote Originally Posted by Tommy View Post
    Ohhh how classic would pipe threads be on a barrel
    If you did it up real tight it would give the muzzle some choke like the flash 22lrs
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  14. #14
    DPT
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    Id find it interesting that the thread has been changed from 5/8-24 to 16x1, both threads are very very similar in diameter and pitch. It could possibly be an over sized 5/8-24. Who threaded it?
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  15. #15
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    Not trying to complicate things but being in the hydraulic Hose game I find an M16 thread is typically .1 - .2mm under size. So smack on 5/8". and the differance between 24tpi and 1mm pitch is about bugger all, 24tpi would be 1.05mm.
    So none of this helps explain a thread OD of 16.2mm
    Zq

 

 

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