How to remove thread locker residue from screws

Discussion in 'Maintenance, Tinkering & Embellishment' started by Aerosmith101, Sep 18, 2020.

  1. Aerosmith101

    Aerosmith101

    107
    Oct 28, 2018
    How do I remove old thread locker residue from the screws on my knife?
     
  2. Backyard

    Backyard

    141
    Jul 19, 2019
    The best I've found was to wire brush them. Heat helps soften it and can make stubborn thread locker easier to remove. Knife screws are normally pretty small so thay would be difficult. I don't know if it would work but you can try methylene chloride which is found in the good paint strippers. Otherwise I haven't found anything else that effectively dissolves or loosens PMMA type products once cured

    If it's cyanoacrylate based you can try acetone
     
    Last edited: Sep 18, 2020
    kreisler likes this.
  3. tiguy7

    tiguy7 Gold Member Gold Member

    Jun 25, 2008
    Cyanoacrylate isn’t particularly resistant to water, but the soak time may be long.
     
  4. pndubisk

    pndubisk Gold Member Gold Member

    11
    Sep 11, 2020
    DCM will eat just about any thread locker or epoxy, very few materials are chemically resistant to it. Proper PPE should be followed, read the SDS. It passes right through nitrile and latex and is absorbed directly into your skin. The stuff at the hardware is probably not all that strong but I question why it's in stores at all, very carcinogenic, very nasty.

    With all that said, assuming proper PPE and care, it's a great solvent that does not leave a residue behind.
     
  5. 000Robert

    000Robert Gold Member Gold Member

    Mar 28, 2020
    According to the TDS, you soak them in methylene chloride, or paint stripper, and then remove with a wire brush.
     
  6. pndubisk

    pndubisk Gold Member Gold Member

    11
    Sep 11, 2020
    Well, it does work great lol.

    Seriously though, at least check out the sds before working with a chemical that's a well known carcenegon.
     
    000Robert likes this.
  7. kreisler

    kreisler

    594
    May 11, 2012
    all these chemicals, do we get them on amazon and what's their product name?
     
  8. pndubisk

    pndubisk Gold Member Gold Member

    11
    Sep 11, 2020
    Hmmm idk, shipping would be expensive no matter what, anything over 2ml or maybe it's 30ml is going to ship as a dangerous good iirc.

    Anyways, loctite branded solvent is DCM (methylene chloride) but as a an earlier poster mentioned it's in some paint strippers to apparently. I know I can't find it on store shelves in my area, I've had to use the stuff at my work.
     
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  9. kreisler

    kreisler

    594
    May 11, 2012
    i googled the term <loctite dcm> and got nothing in this regard. ah nm. unwatching this thread now
     
  10. Backyard

    Backyard

    141
    Jul 19, 2019
    Both of these are common at most hardware stores and contain methylene chloride

    [​IMG]

    [​IMG]
     
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  11. 000Robert

    000Robert Gold Member Gold Member

    Mar 28, 2020
    I just googled, "threadlocker TDS", and this PDF link was at the top of the list. Maybe you just need to learn how to google and not give up so easily...
     
    kreisler likes this.
  12. Alberta Ed

    Alberta Ed

    Jun 29, 1999
    A small brass bristle brush works well.
     
  13. Tjstampa

    Tjstampa Gold Member Gold Member

    345
    Mar 25, 2019
    In another thread someone had good luck with goof off
     
  14. kreisler

    kreisler

    594
    May 11, 2012
    i think in RL a pro industrial (or i) would simply use new screws and be done with it

    a tiny screw costs like 0.12
     
  15. neo71665

    neo71665

    171
    Feb 18, 2020
    Heat the screw up and wire bush the ash off
     

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