Glock and loctite

[Clyde777]

last night I redid the front sights on my glocks and everything was good so this morning I was gonna take them out to go shooting so I was cleaning it and someone knocked over my clp onto the slide and spilled all over the slide. Is it possible for the clp to affect the red loctite in the sight since it hasn't been 24 hours yet to dry all the way?

[26 Inf]

That is not something that I would worry about.

When you think about it, if the CLP was spilled onto the exterior of the slide it would have to wick between the sight and slide, down the the side of the portion of the sight which fits into the cutout on the slide and then up along the threads of the machine screw holding the sight in place.

I've installed dozens of aftermarket and Glock front sights on pistols, most of which were used that same day and then cleaned that evening (LE training range) with no problems.

I wouldn't be concerned, you can always periodically check your front sight for looseness to reassure yourself.

[ggammell]

Yeah man I’d say good to go. I’ve seen sights mounted wit blue and shot literally minutes later. The screw tension is doing most of the work. The loctite is just insurance.

[Clyde777]

Okay cool I just didnt know if the clp got into it somehow if it would mess with the red loctite in some way and not let it dry all the way or something.

I have another question I had someone tell me to make sure the loctite is only on the thread portion of the screw and if you put it on the tip, it could prevent the screw from tightening all the way as the loctite will be trying to compress between the tip and the bottom of the hole in the sight. These are night sights so I dont think the tip of screw would be touching the bottom of the hole but I did put red loctite over the whole screw including the threads and the tip will this cause issues?

[mark5pt56]

Provided the sight is tight, no worries.

[Bart Noir]

Red Loctite? Those sights will never come off, unless somebody knows a solvent or something. I could not get a front sight off after using only blue Loctite. That little rim on the screw doesn't let the sight tool apply all that much torque.

And why in heck does blue Loctite come in a red tube?

Bart Noir

[5.56Geo]

And why in heck does blue Loctite come in a red tube?

Bart Noir

The same reason you park in a driveway and drive on a parkway.

[ST911]

Red Loctite? Those sights will never come off, unless somebody knows a solvent or something. I could not get a front sight off after using only blue Loctite. That little rim on the screw doesn't let the sight tool apply all that much torque.

And why in heck does blue Loctite come in a red tube?

Bart Noir

It comes off.
Some FS screws have more surface area than others, and the tool matters.

[NYH1]

And why in heck does blue Loctite come in a red tube?

Bart Noir
Yeah, I always wondered about that myself. Didn't red Loctite once come in a blue tube?

NYH1.

[AKDoug]

Yeah, I always wondered about that myself. Didn't red Loctite once come in a blue tube?

NYH1.

Yes. I still have red locktite in a blue tube. To remove is simple. Take a soldering iron and apply it to the head of the screw for a few seconds. It will come right out.

[Clyde777]

So trijicon contacted me and told me to use green loctite 290 instead. So I am gonna try that. Do you apply it just like regular loctite a little on the thread then install? It says to use green 290 on pre assembled screws.

[26 Inf]

So trijicon contacted me and told me to use green loctite 290 instead. So I am gonna try that. Do you apply it just like regular loctite a little on the thread then install? It says to use green 290 on pre assembled screws.

Green loctite 290 is a 'wicking' thread locker - it will seep through the threads via capilary action and sets. Red and Blue are 'anaerobic' threadlockers - they will set in the absence of air as they fill the voids between the threads on tightened fasteners.

According to the data shee t'green' sets via the same action - The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. The product can also fillporosity in welds, castings and powdered metal parts.

Also on the data sheet: For Assembly 1. For Blind Holes, apply several drops of the product down the internal threads to the bottom of the hole

Notice this says 'for assembly' versus 'for pre-assembled threaded parts with through hole' - I read someplace else the the green IS NOT recommended for use on PRE-ASSEMBLED THREADED PARTS IN BLIND HOLES

www.loctite.sg/sea/content_data/93808_290EN.pdf

Hope this helps.

[davidjinks]

I don’t think there is going to be an issue. I use blue loctite for all of my sight installs. They’ll sit over night and then off to the range the next morning. No issues with lubrication affecting the thread locker.


last night I redid the front sights on my glocks and everything was good so this morning I was gonna take them out to go shooting so I was cleaning it and someone knocked over my clp onto the slide and spilled all over the slide. Is it possible for the clp to affect the red loctite in the sight since it hasn't been 24 hours yet to dry all the way?

[P2Vaircrewman]

I installed the Ameriglo sight with JB weld about 3 years ago on my G19 and recently noticed it has become loose. The screw was as tight as when I installed it but the sight will twist side to side. It appears the oval hole in the slide is bigger than the siiht base. That is why I used JB weld to begin with. If JB Weld won't hold I don't what will.

[EzGoingKev]

Loctite sells a few greens.

The 290 is between the blue and the red. Make sure you get that one and not one of the bearing and stud retaining formulas.

The funny thing is I use the low strength pink on my Glock front sights and have never had one come off.

[P2Vaircrewman]

I installed the Ameriglo sight with JB weld about 3 years ago on my G19 and recently noticed it has become loose. The screw was as tight as when I installed it but the sight will twist side to side. It appears the oval hole in the slide is bigger than the siiht base. That is why I used JB weld to begin with. If JB Weld won't hold I don't what will.

An update of my previous post.
I removed the sight and cleaned up any trace of the JB Weld, I then reinstalled the sight and tightened the screw. With the screw as tight as I felt was safe without breaking it I could still twist the sight easily side to side in the slide. I removed the sight and screwed the screw screw into it as tight as before and I could see a slight gap between the sight tenon and the screw head.
Because the threads on the screw are not formed all the way to the bottom of the screw head is the reason for the gap. My solution was to use a drill bit slightly bigger than the screw hole and by hand cut a slight taper in the hole there by removing the first 1 or 2 threads. After that the screw head would pull up flush with the sight tenon. I reinstalled the sight and I could no longer twist it side to side.
To address the issue of the sight tenon being slightly narrower than the slot in the slide I used a strip of aluminum foil placed over the slot and then put the sight in place. That took up the side to side looseness. I then installed the screw with blue Loctite and all is good.