plunker22

I have 2 MK II's that were D&T'ed. Both have had the screws holding the scope mount loosen. I did use blue lock-tight. Any help here?

One is a MK 10 with a 2x Truglo red-dot, the other stainless 22/45 with a reflex. Both are fantastic @ 50 yd! Hoping to try them @ 75 this weekend. I have ordered a B-Square mount to use if I can't get the screw to hold!

Dsteele

Did you degrease the screws before using the locktite? If not try that and let the locktite really bond for a few days before shooting.

Rocad

Did you try cleaning off the screws with alcohol first?

I just tried RED loctite (I know that's overkill but I did not want them coming loose) and it did'nt hold at all on two 10/22 scope mounts.....must have been bad batch, was a new tube too!

I just bought a new tube of BLUE and will try that.

Ruger Redhawk

Make sure you degrease it before using Loctite. The Blue 242 should be all you need. The Red 262 you will never get back off.

gunjunkie

I degrease and use the Purple Loctite for small bolts.

KJS

The Ruger manual says to use Red, something I'd prefer not to do as it would seem to be just short of welding stuff together.

Last fall I bought a red dot and attached the mounting rail using Blue as virtually everyone suggests is the optimal choice. It remained in place just fine for 10,000 rounds or so. Then I had to mount it yet again with Blue, which then came loose after perhaps 200 rounds only.

Well, after that I was forced to go up to Red. It's still on there after 500 rounds & I'll have to see how that goes. I would never have used Red if I had any other option.

Actually, I have found Red isn't permanant in all cases. I once sent my MKIII back to Ruger for repair. They ended up having to replace the entire upper half of the gun. Upon getting it back I took out the front sight screw as I wanted to put on some Purple (the hard-to-find low strength version) as my experience had been that front sights otherwise come lose within 10 shots.

Seems Ruger knows how front sights come loose too, as I found it oddly hard to remove though I got it out with mere hand pressure and it's not like I'm some hulking giant. Then I see red residue on it. I took it out only to find they'd already put Loctite on that one, so I wasted my time there.

BTW, In all cases I have degreased with alcohol & I allow it to cure for a number of days just to be sure. Loctite claims full cure in 24 hours, but it's not like giving it more time is going to do any harm.

BudmanOH

There is actually a Loctite primer also. Sounds like you cleaned it every time. You may try the primer and then apply blue Loctite. I'm shocked you were able to get that screw out with red Loctite. You generally have to heat it up to even have a chance. I work in maintenance doing machine repair and have actually attended some Loctite training classes. Surprised the blue isn't holding. Good luck.

stargeezer

Isn't the holding power of locktite Dependant on the total surface area coated (or contact area)? Those little screws don't have a huge amount of surface area. Could that explain how the screws coated with Red were turned out without heating them.

FWIW, I use blue and have not had any problems, but I might switch to red when I mount up new sights on my new 22/45 lite.

KJS

I suspected it might also be an issue of how much is used. The front sight screw I spoke of appeared to have only received a tiny dab of Red, rather than Ruger trying to fully coat all threads. But then it doesn't have to be a really strong hold when a front sight weighs next to nothing. Good they didn't use a huge amount as one might actually wish to replace a front sight, perhaps with a HiViz sight.

The 3 screws that keep my $200 MatchDot from becoming a fallen BrokenDot have to do a whole lot of work with very little surface area. I use quick detach rings that are steel, adding a few more ounces than the aluminum rings that came with the scope. Rings & scope provide a hefty 10 ounces for them to keep in place.

I bet most people would never get Blue to fail, but I loved my red dot so much that I used it a whole LOT. Those who don't fire 10,000 rounds probably will never personally know what it takes to make Blue fail.

plunker22

Thanks for the replies!! I used blue last time. I just got a NEW tube, and some cleaner, so will re-do it when I have time on the 22/45. This will be the first re-attempt on it. On the MK 10 I reapplied about 2 weeks ago and haven't had the chance to shoot it yet! Will this weekend. If it comes loose, will give it a GOOD cleaning and reapply.

BudmanOH

Also keep in mind that you need to use the proper amount. You can actually use too much or too little. Go to the Loctite website to check out. I have some info on Loctite but it's at work and I have many things going on to remember all the details. Good luck.