Mikelindsey Posted August 9, 2015 Share Posted August 9, 2015 I know there are several kinds. I want he kind that secure the screw thread but can still get it out if necessary. Thanks Link to comment Share on other sites More sharing options...
Round_Gun_Shooter Posted August 9, 2015 Share Posted August 9, 2015 Blue Loctite http://www.amazon.com/Henkel-01-24200-Loctite-6-ml-Threadlocker/dp/B000I1RSNS/ref=sr_1_1?ie=UTF8&qid=1439079490&sr=8-1&keywords=loctite+242+blue&refinements=p_85%3A2470955011 Link to comment Share on other sites More sharing options...
toothandnail Posted August 9, 2015 Share Posted August 9, 2015 Blue, red, NOT green Link to comment Share on other sites More sharing options...
Poppa Bear Posted August 9, 2015 Share Posted August 9, 2015 If you want vibration get purple which is available in auto parts stores. It does not require heat. If you want to set and forget with only a slight chance of removal get blue which is the next step up. Red is a step above blue and usually requires a bit of heat to break free enough to not destroy the screw/ screwhead. Link to comment Share on other sites More sharing options...
TDA Posted August 9, 2015 Share Posted August 9, 2015 I prefer Vibra-Tite: http://www.mcmaster.com/#threadlockers/=yew7cl Link to comment Share on other sites More sharing options...
Mikelindsey Posted August 9, 2015 Author Share Posted August 9, 2015 Thanks so much guys! Link to comment Share on other sites More sharing options...
427Cobra Posted August 9, 2015 Share Posted August 9, 2015 Blue for anything that maybe taken apart later Red for anything that never comes apart later Green is used to fill voids, somewhere between red and blue This is the logic that I use on 737s Link to comment Share on other sites More sharing options...
Pat Miles Posted August 9, 2015 Share Posted August 9, 2015 Blue for anything that maybe taken apart later Red for anything that never comes apart later Green is used to fill voids, somewhere between red and blue This is the logic that I use on 737s This is the correct info regarding Loctite. Fasteners with red Loctite can be taken apart or removed but a good amount of heat is necessary. A hair dryer will NOT work! Link to comment Share on other sites More sharing options...
toothandnail Posted August 9, 2015 Share Posted August 9, 2015 I use red almost exclusively, almost never use heat to remove parts. It will make a loud POP when it turns loose though. Link to comment Share on other sites More sharing options...
jmorris Posted August 9, 2015 Share Posted August 9, 2015 FWIW there are so many different manufactures and grades within them color isn't the indicator it used to be. Read the bottle. Some green is bearing retainer, some purple is "wicking" most use red to indicate "hi strength" and blue "medium" but not every one. For example Loctite makes no less than 22 different formulations (I say no less because I have some that are not on this list) http://www.henkelna.com/us/content_data/166733_LT4985_Threadlocking_Guide_032010_Web.pdf And now they only use 5 different colors for all of them. Link to comment Share on other sites More sharing options...
Mikelindsey Posted August 9, 2015 Author Share Posted August 9, 2015 Just looking to mount a small red dot to a 1911. Obviously need protection from vibration. Link to comment Share on other sites More sharing options...
jmorris Posted August 9, 2015 Share Posted August 9, 2015 Just looking to mount a small red dot to a 1911. Obviously need protection from vibration. Depends, if you use counter sink screws the taper and surface area alone will keep them from backing out. If your looking at a set screw, I would use 222 or nothing first. If it moves go to 243. 263 on a #5 set screw or smaller will generally result in a stripped out socket if you ever try and remove it. Link to comment Share on other sites More sharing options...
Graham Smith Posted August 9, 2015 Share Posted August 9, 2015 While people are used to using color as a reference, take care to know what Number you need. "Blue" Locktite is #242 and comes in a red tube with a blue stripe. "Red" Locktite is #271 and comes in a nearly identical red tube with a red stripe. You can find similar looking tubes in an automotive store but with different numbers used for different things. Link to comment Share on other sites More sharing options...
jmorris Posted August 9, 2015 Share Posted August 9, 2015 They also don't recomend 242 for fasteners under 1/4". Link to comment Share on other sites More sharing options...
truborshooter Posted August 10, 2015 Share Posted August 10, 2015 220 seems to be the best for our gun smithing use Link to comment Share on other sites More sharing options...
rdinga Posted August 10, 2015 Share Posted August 10, 2015 lol i just applied blue loc tite to the screw that holds the roller handle in place on my 1050. It kept coming just a little loose during long sessions. Link to comment Share on other sites More sharing options...
Graham Smith Posted August 10, 2015 Share Posted August 10, 2015 (edited) 220 seems to be the best for our gun smithing use Another place where it gets confusing. Too many numbers... 220 a medium strength (blue) wicking formula designed to used on preassembled parts. Works just fine for guns. 242 and 271 are high temp, mil-spec, designed to go onto parts prior during assembly Edited August 10, 2015 by Graham Smith Link to comment Share on other sites More sharing options...
Mikelindsey Posted August 10, 2015 Author Share Posted August 10, 2015 Thanks Morris, I think I'll take your advice and try without anything and see if the two very small screws stay put. Link to comment Share on other sites More sharing options...
hceuterpe Posted August 13, 2015 Share Posted August 13, 2015 I wouldn't use blue if screw is small. This is the description of purple: Typically used with small screws up to 1/4". Link to comment Share on other sites More sharing options...
9x45 Posted August 14, 2015 Share Posted August 14, 2015 Thread locking compounds are rated by torque. most people think higher is better, but it is rated for thread size. There are also gap fillers, and bearing locking compounds. Personally I don't use them, but rather only use Permatex # 2 for gun parts. I have installed hundreds of Glock sights, and several dozen dots, using Permatex. None have ever come loose, and if you ever need to switch sights from one to another, it does no damage to remove it as this material never fully cures. It is also highly solvent resitant Link to comment Share on other sites More sharing options...
mikeinctown Posted August 14, 2015 Share Posted August 14, 2015 Whatever you get, just remember you only need a drop. You don't need to slather the entire part, bolt, or whatever in the stuff. Link to comment Share on other sites More sharing options...
Mikelindsey Posted August 15, 2015 Author Share Posted August 15, 2015 I put about 75 rounds through my FNH FNX 45 cal with a Trijicon mini dot scope and when done the screws were still tight. Thanks to all but I'm gonna keep it dry unless I have probs. Link to comment Share on other sites More sharing options...
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