Which Loctite?

I need to mount a base to a shotgun, to put a vortex on. Which loctite do I need to use, or should I not use any? I remember someone discussing this in another thread in the past. Thanks

I use the Loctite Blue 242 when I need to. It’s a good thread locker and sealer but removable with hand tools.

I use LocTite 222 ( Purple )

Blue

Blue

Either purple or blue will work, but if you’re talking a shotgun base, then blue would be stronger....IIRC

Rings should not need loctite, provided good screws and proper torque for threads. If you just have to use loctite on rings, purple has been easier to remove later.

Clean and prime screws and threads, it'll hold much better.

I used it when I owned a .50 I think that was the only time that I can recall.

Thanks guys

Used finger nail polish and had good luck

RED

































Just Kidding 😁

I use blue on base screws.
I use purple on the screws that hold the sight to the base.

I don't use any on scope ring cap screws

^^^^^
Pretty much the way to go. Purple is removable for scope cap screws, but it jacks up any torque value and can stretch threads too much.

It really depends. I use blue on everything, but if it’s a base that you know you will never take off again, I might be inclined to use red. You can still get it off if you ever needed to. Just a little heat and it will come off.

Never heard about stretching threads , next time the Loctite Rep comes in the shop I'm gonna quiz him on it.

I wouldn't bother the fact of the matter is you don't need it. I have only used it one time in my life and I can't tell you why I used it then other than I read some thread on the internet and convinced myself I should try it. I think it was on an AOL Chat room or something... LOL! That's how this shucks gets started.

I prefer the red Loctite but only use it to keep a Clorox jug stuck to my killin’ stump

In all seriousness I use it when installing stake on 1911 front sights.
Never had one I put on shoot lose or fly off either.

Torquing a fastener implies stretching threads (aka preloading). Adding a liquid to threads changes the friction coefficient and will screw up torque values. Maybe someone could use a "dry thread" torque value on "wet" threads and "stretch" the threads even more but really just means overtorquing or taking the metal beyond yield strength into plastic deformation.

Sorry I should have stated never heard of loctite causing thread stretching. There are torque values for dry and lubed threaded fasteners. High quality shcs come lightly lubed. I'd think the torque spec provided with the mounts wouldn't change adding a drop of small screw loctite. That's just my thoughts applying what I've learned over my career pulling shcs as a tool and die maker.