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Loctite on S&W thumbpiece nut?
- Thread starter Carmady
- Start date
Aguila Blanca
Staff
Which Loctite?
1911_Hardball
New member
Purple is lower strength than blue.I used blue 242. I'll try purple if blue doesn't work, since it's a small screw size.
Aguila Blanca
Staff
If 242 (Blue) won't hold it, 222 (Purple) definitely won't hold it. What materials are the screw and the sight? Loctite needs primer activator for some metals, a fact I learned just a few days ago.
1911_Hardball
New member
Right regarding the sizes, but the manufacturer lists 242 as "medium strength" and 222 as "low strength".Purple 222 is for fasteners from #2 to 1/4" (2.2-6mm)
Blue 242 is for fasteners from 1//4" to 3/4" (6-20mm)
I had 242 fail a few times on the thumbpiece set screw/hinge pin on a LCR. It kept backing out on range day.
It's important that with any application that the threads be free of grease/oil.
Stroker468
New member
I used blue... holding after about 200 rounds through my 629.
Is your thumbpiece screw always loosening up. or is it stripped out? The reason I asked was I recently replaced one that had the threads badly messed up. I don't know if it was cross threaded during the manufacture of the screw or when it was put on the pistol- but either way, check to make sure something isn't wrong with it.
"Right regarding the sizes, but the manufacturer lists 242 as "medium strength" and 222 as "low strength".
It's important that with any application that the threads be free of grease/oil."
I always clean the threads with alcohol, lighter fluid, acetone, etc. With the LCR I went easy on the female threads because I didn't want to leave any traces of paper towel in there. The Ruger tech advised against Loctite, but use it lightly if necessary...that was to make it easier on them if they ever need to disassemble it.
Back to the low strength purple stuff, I was thinking it might also be a thinner mixture which would work better with the smaller threads. I've never used it, but will get some and try it on the 10 if the 242 blue fails and the thumbpiece backs off again.
Both male and female threads on the thumbpiece looked just fine.
I've seen a lot of buggered up thumbpiece nut slots on GunBroker.
It's important that with any application that the threads be free of grease/oil."
I always clean the threads with alcohol, lighter fluid, acetone, etc. With the LCR I went easy on the female threads because I didn't want to leave any traces of paper towel in there. The Ruger tech advised against Loctite, but use it lightly if necessary...that was to make it easier on them if they ever need to disassemble it.
Back to the low strength purple stuff, I was thinking it might also be a thinner mixture which would work better with the smaller threads. I've never used it, but will get some and try it on the 10 if the 242 blue fails and the thumbpiece backs off again.
Both male and female threads on the thumbpiece looked just fine.
I've seen a lot of buggered up thumbpiece nut slots on GunBroker.
Aguila Blanca
Staff
As has already been pointed out -- if #242 (Blue) doesn't hold it, #222 (Purple) absolutely will not hold it. The reason Purple is listed for small screws is because Blue is aggressive enough that the torque needed to remove it may shear off small screws.Carmady said:Back to the low strength purple stuff, I was thinking it might also be a thinner mixture which would work better with the smaller threads. I've never used it, but will get some and try it on the 10 if the 242 blue fails and the thumbpiece backs off again.