Has anybody here tried using Loctite Form-a-thread on miscellaneous screw threads that got stripped. This would be to keep the screw thread size original. I had a tang sight filler screw that was locked in it's hole on my Stevens Favorite and the tiny screw driver slot was torn out. The tiny filler screw was like this when I got the receiver. I decided to use a smaller drill and drill out the screw and re-tap the hole with a 5-40 tap to keep it original. I don't know if I did a poor drilling job or the tap was not exactly right but I found when I installed a tang sight the sight screw would tighten then let go. I didn't try to tighten the screw real hard but it would just kind of let go. I want to keep the screw threads original so I ordered some Loctite Form-A-thread and hope I can get the sight screw the normal amount of tightness again. 

Have used it successfully. Clean everything well, follow the instructions, particularly the dry times.

Should be fine for what you are doing, but seems to work best with something that does not have to come a part all the time.

Dellet wrote on Jan 22^nd, 2021 at 11:30am:

I had put scope bases on the rifle and was using a Lyman Jr. target spot but it seemed to be a bit much for my 25 yard target range so I took it off and went back to the Vernier sight. I need the iron sight practice so I don't think it will be coming off at all. I was going to clean up that tang sight screw hole with brake cleaner and then blow it out good with my compressor.

22_boomer wrote on Jan 22^nd, 2021 at 7:27pm:


Mounting a base should be no problem, only other thought would be making sure the screw has good threads to form from.

It might be a problem say for using as the screw that holds the staff to the base if you take the staff off and on everything prime you shoot.

I have used it for sight and or scope bases, a fore end for sure that I can remember. At work it’s often for pipe plugs into aluminum or cast iron. Hold up well enough that transmission oil won’t seep through.

Biggest problem for me is time, try to save a few minutes and torque down the bolt early and cost myself a few hours re-doing the job. Not rocket science to use, just tough on impatient people with an occasional ham fist.

Don't need to wait too long, as the instructions say to remove the screw after applying the Form A Thread, after 5 minutes. But then wait a full 30 minutes before reinstalling the screw. I wait a good hour myself, just to make sure it's fully cured. But waiting too long to pull the screw out might make it a little harder to pull.

Those tiny plugs screws give most of us fits! But on the topic of vision, I keep a cheap magnifier visor hanging above my gun bench just for this reason! It has two flip up lenses, plus a small jeweler's loop also, so it will magnify anything I'm having trouble seeing, and keep my hands free. Think it cost me $7-$8 at Harbor Freight, and well worth the price for what it does for my old eyes.
I have a Brownells screwdriver set with interchangeable tips for gunsmithing. It's magnetic, but wont hold a very large screw as it's low magnetism. But it will hold those tiny plug screws, so it helps immensely.

I have a couple Chapman gunsmith sets, and the Brownells gunsmith set. Both are great, but the Chapman isn't magnetic, the tips are held in by a detent ball. Sometimes a non magnetized is better, and other times not. 
I also have a little tool that magnetizes screwdrivers, and also demagnetizes them. It's a square plastic block with a square hole to run the screwdriver tips through. A pass or two magnetizes them, and when you're done pass them through the opposite direction and it demagnetizes them. Bought it at an electrical supply house many years ago when I was still doing electrical work.