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Thread: UZI TECH

  1. #21
    UZI Talk Life Member
    BWE Firearms's Avatar
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    May 2008
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    Longwood, FL
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    When replacing your top cover make sure you have the proper .005" to .015" clearance between the top of the bolt and the top cover.
    Richard Hoffman
    Gunsmith/Owner

    BWE Firearms & Parts
    Longwood, FL
    (407) 592-3975
    www.bwefirearms.com
    richard@bwefirearms.com

  2. #22
    UZI Talk Life Member
    BWE Firearms's Avatar
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    Uzi Model A rear sight screw threads are 1/8" BSW (British Standard Whitworth). The grip and forend screws use the same thread.
    Richard Hoffman
    Gunsmith/Owner

    BWE Firearms & Parts
    Longwood, FL
    (407) 592-3975
    www.bwefirearms.com
    richard@bwefirearms.com

  3. #23
    UZI Talk Life Member

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    Quote Originally Posted by BWE Firearms View Post
    Uzi Model A rear sight screw threads are 1/8" BSW (British Standard Whitworth). The grip and forend screws use the same thread.
    Thanks for that tidbit and now it makes sense to me.

    Wanting some spares, a few weeks ago, I looked and couldn't find machine screws ANYWHERE locally that would match up to the grip threads on my Model B.

    In defeat, I came back home to lick my wounds and research it.

    At Shadeone's site: (http://www.shadeone.com/guns/parts.html) I found this in reference to the screws... "A few aftermarket companies use Allen bolts with an ugly bright gold/brass color to them so be careful. Thread size 5-40".

    I went and looked in my own shop at my containers of screws and found that not only did I have them but the UNC 5-40 screws really did fit the nuts in the grip. After doing research today and comparing the two different thread designs, I found that while they are not the same, they are pretty close to being the same spec.


    UNC - Unified National Coarse Thread - 60 Thread Angle ANSI B1.1

    VS

    BSW (British Standard Whitworth) Coarse Pitch - 55 Thread Angle BS84



    Nominal - TPI - Pitch mm

    5-40 UNC - 40 - 0.635

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