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Cleaning Blue Loc-tite out from threads?

Discussion in 'Gunsmithing and Repairs' started by cavman, Nov 3, 2007.

  1. cavman

    cavman Well-Known Member

    I have a SW M41 and am setting it back up without the rail and red-dot. The rail was mounted to the barrel with four screws using Blue loc-tite.

    I have unscrewed them, and am trying to put back the little, original screws in their place. However, there appears to be residual glue in a thread or two, and three of four screws won't go back in easily.

    I have swabbed with CVS finger nail polish remover (1st ingredient, acetone) to help with glue removal. It doesn't seem to have dissolved all that great.

    Any ideas on how to make that glue go away, so I can put back the screws unobstructed?

    Last edited: Nov 3, 2007
  2. Chief-7700

    Chief-7700 Well-Known Member

    Cavman, Try Brake Clean you can get it at any auto parts store.
  3. cavman

    cavman Well-Known Member


    Will do.
  4. Chief-7700

    Chief-7700 Well-Known Member

    If the Brake Clean does not work, you may have to get a thread die and run the screws though it that will clean the threads up.
    It would not hurt to get a tap and clean the threads up in the barrel.
  5. cavman

    cavman Well-Known Member

    For me it is the other way around I think.

    The barrel is the one with the screw holes, and the threads of those holes have residual glue in them, making the original, clean screws not fitting.

    In any case I can just soak the barrel with Brake Clean?
  6. rcmodel

    rcmodel Member in memoriam

    Brake Cleaner won't touch Lock-Tight. Don't even bother.
    You might try soaking in acetone for a day or two, but I don't know if it will help or not.

    I usually can pick it out with a small dental pick. Failing that a properly sized thread tap.

    You could keep running the long screws in & out and see if that cleans some of it out.

  7. mrmeval

    mrmeval Well-Known Member

    Q: How can I remove a fastener that is "permanently" locked in?

    A: The application of heat is needed to remove a fastener that can't be removed with a hand tool. Temperatures of 325F and above is needed to break down a standard anaerobic, 500F for high temperature Anaerobics. A heat gun or propane torch is commonly used to do this process, and careful disassembly should occur while parts are still hot. Once apart, and cooled, use methylene chloride (Chisel #79040) to remove cured excess material. Always wipe down the fasteners with clean up solvent to remove the wax film that Chisel leaves on the surface.

    Info from here.

    Some suppliers here.

    Info on the chemical here.
  8. eastwood44mag

    eastwood44mag Well-Known Member

    I use Gun Scrubber to clean up Loc Tite on the work bench. Try it and see what happens.
  9. brickeyee

    brickeyee Well-Known Member

    MEK, Methyl Ethyl Ketone
    In the paint section.
  10. cavman

    cavman Well-Known Member

    Thanks for all the great suggestions. I simply tried this one, running them in and out, over and over. It seemed to have done the trick. When I went back to the little ones, they screwed in smooth as could be,

  11. ScottsGT

    ScottsGT Well-Known Member

    For future reference, use Super Glue Debonder. Works every time.

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