loctite

Locktite is a beaut. Once set it is NOT for disassemble in "plastic" enviroment. Have you considered silicone putty instead. A blob will glue the parts and have some effect during vibrations. And can be put apart if needed.

HTH

Stanislaw

If you are screwing a metal screw into a thread tapped into metal, loctite should stop it coming loose, and you should still be able to unsrew the screws at some later date. You will have to apply some force, but you won't distort the screw head.

-- Bill Sloman, Nijmegen

Depends upon the grade you use, See

But the most common are: 242, it's blue and mild stength. 271 is red and quite strong, the green one (can't recall the #) takes a LOT of effort to release it, you will probably destroy 2mm screws first.

Barry

Light heat (hold a soldering iron against the nut) will assist in releasing it.

Loctite makes a wide variety of locking products, ranging from ones that you can break free with your fingers to ones that will make you think somone welded the nut on. See [

Removable Strength Bolt reusability is important in maintenance and repair work. Threadlockers with low to medium strength can be loosened without damage to bolts with ordinary tools. 222 Threadlocker Low Strength/Small Screw 242 Threadlocker Medium Strength 243 Threadlocker Oil Resistant/Medium Strength 246 Threadlocker High Temp./Medium Strength 266 Threadlocker High Temp./High Strength 294 Threadlocker High Temp, Wicking Grade 2432 Low Halogen, Low Sulfur 2440 Threadlocker Primerless/Medium Strength

Permanent Strength These products are intended for products that do not require disassembly. If disassembly is required, use localized heat and hand tools. 262 Threadlocker Medium to High Strength 270 Threadlocker - Maximum Strength Stud Locker 271 Threadlocker High Strength 272 Threadlocker High Temp./High Strength 277 Threadlocker High Strength 2760 Threadlocker Primerless/High Strength

Pre-assembled Parts (Wicking Grade) Penetrates threads by capillary action (wicks); simplifies preventative maintenance. Secures set screws and other assemblies after settings and final adjustments are completed. 290 Threadlocker Wicking Grade

Products for Plastic Fasteners For use in place of anaerobic threadlockers on most thermoplastics (ABS, PVC, etc.).

Assure 425 Surface Curing Threadlocker

Never ever ever apply Loctite to a thermoplastic like PVC or Delrin.

The stuff like Vibratight or RTV is ok.

The "stop nuts" and the like used on aircraft work ok.

Are these standard threaded 2mm screws or some special thread for plastics and what are they threaded into? Standard metric threads are much too fine for use on soft materials. If that is what has been done, the threads are likely stripping and the screw comming out. It they aren't turning and backing out.

If it is brass inserts in plastic, a bit of RTV may help but there is still some risk that the threads are stripping out.

Thanks guys, it's an aluminum 2mm screw that goes into a threaded alum casing. Sounds like loctite 222 might be the ticket.