![]() It’s not necessary installing a CAR-style buffer tube because these have a castle nut that’s also a lock nut, in effect, but it cannot hurt.Ī drop of purple is a great detail touch for many small screws, like handguard rail screws, gas block set screws, trigger adjustment screws, and the like. The first that comes to mind is installing the lower receiver extension tube (“ buffer tube”) for a rifle-stock configuration. However, there are a few specific points and processes in a build where I highly recommend the use of threadlocker. So, where to use which, and when? Put us all together and I imagine we could brainstorm a few pages worth. I’m not saying to use threadlocker for this reason, but it is a validation to use threadlocker! It won’t hurt a thing and might save a day. There are also instances on an AR-15 where a steel screw is threaded into aluminum, and other areas where these metals make flush contact. A mating of steel and aluminum can, over time, effectively weld the parts together. And! Let it sit a full 24 hours or it will not cure.Īnother thing to know, and keep in mind, is that these threadlocking compounds also inhibit corrosion. Always (always) degrease all surfaces in contact with the glue. This also makes excess threadlocker pretty easy to clean up and off unwanted areas. Epoxy doesn’t really work well at all unless parts have been “roughed up” - it has to have a gap to seal to get maximum hold. Unlike epoxy (exactly unlike epoxy), threadlockers work best where there is only a tiny gap between parts. You can drip a few drops on the bench and it will stay liquid until some great time passes and some evaporation occurs. ![]()
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