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Author Topic: 14-1 LH over 9/16-24 LH?  (Read 576 times)

Roper1911

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14-1 LH over 9/16-24 LH?
« on: February 11, 2017, 01:50:59 PM »
I'm looking at mounting a Strike J-Comp v2 to my PARA when it gets here. but the J-comp comes in 1/2x28 RH, and 14-1 LH. or standard .223/5.56 and AK 7.62. AK's 14-1 thread is non-standard (its usually 14-1.5 or 14-2)
basically I want to figure out if you can run a tap into the AK J-comp and have it work, if the major diameter on the 14-1 is actually 14mm, it's a little bit small. 0.5511 against 0.5625, which is only 0.0114 small, the pitch of a 14-1 is naturally 1mm, or 0.03937 to the 1.058mm or 0.04167 of the 9/16-24. (0.00197 difference) (a 9/16-25.4 would be almost exactly a 14-1 thread.)
if my math is right- a 9/16-24 should almost perfectly fit on a 14-1 thread. but a 14-1 thread should be a little bit tight over a 9/16-24.
seeing as I'm already looking at doing the insanity of putting a Zhukov Yugo stock on my FAL when lear gets the adapter them made, would running a tap into a AK threaded muzzle brake kill it? could you just run a 14-1 onto the 9/16-24 muzzle?


(this might belong in gunsmithing...)
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    MTK20

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    Re: 14-1 LH over 9/16-24 LH?
    « Reply #1 on: February 11, 2017, 02:45:59 PM »
     :shocked

    This is way out of my league.

    But post pics when you're done, you mad scientist  :cool.
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    Roper1911

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    Re: 14-1 LH over 9/16-24 LH?
    « Reply #2 on: February 11, 2017, 03:23:54 PM »
    Oh. Lots. I found references saying that it works like a  charm so I'm going to order it Monday probably, and have my Smith chase the threads with a 9/16-24 LH tap and screw it on. I found lots of instances of people using FAL muzzle devices with no modifications. So I think it's good.
    North Carolina"it has two fire modes, safe, and most decidedly unsafe"
    ~Chief Warrant Leon McMurdo. Shilo Mountain Rangers, sixth battalion. Mount Hector School of Military tactics. November 8th 3451.

    Yes. When the question is 1911, the answer is "yes". ~HVS

    Deathrider1579

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    Re: 14-1 LH over 9/16-24 LH?
    « Reply #3 on: February 14, 2017, 11:40:38 AM »
    It should probably maybe work, you're gonna be dealing with slightly less meat on those threads than normal I think... but it shouldn't matter too much since its just a muzzle device and not gonna serve to mount a can or anything. I'm not a machinist I just dabble, I'm honestly just figuring out threading on my lathe right now. Cut my first threads without using a die that actually fit a muzzle device just last week so don't take my word for it haha!
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    Roper1911

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    Re: 14-1 LH over 9/16-24 LH?
    « Reply #4 on: February 14, 2017, 08:30:58 PM »
    my gunsmith talked me into getting a 5.56 and letting him bore it out to 7.62 and do a full rethread.
    North Carolina"it has two fire modes, safe, and most decidedly unsafe"
    ~Chief Warrant Leon McMurdo. Shilo Mountain Rangers, sixth battalion. Mount Hector School of Military tactics. November 8th 3451.

    Yes. When the question is 1911, the answer is "yes". ~HVS

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