The Original CZ Forum
CZ LONG ARMS => CZ Scorpion EVO => Topic started by: kendetta on February 18, 2017, 10:14:32 PM
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Hello guys , I just purchased a brand new scorpion pistol. While i was trying to remove my trigger group screw (non WORLD LEGAL MODEL) i stripped the hex screw, then i realized there is a lot of threadlocker on screw.
Before i spend money on a gunsmith , I would like to know how to remove the threadlocker, I heard some people uses penetrating oil.. but i dont know which one is safe for polymer.
For the stripped screw removal, i am thinking about using JB welds.
Can someone also tell me where i can find the replacement screw?
Please advise..
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Yeti Works has a grip screw they offer, but it's a bit shorter than the stock screw.
Personally, I'd say now's a really good opportunity to replace the so-so stock grip once you get it off.
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Thank you for your respond, however the stripped screw is located in the lower receiver's trigger housing unit.
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Check out your local hardware store (Ace or Home Depot usually have them in Stock) and get a M4 X .7 10mm Allen head.
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Check out your local hardware store (Ace or Home Depot usually have them in Stock) and get a M4 X .7 10mm Allen head.
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Thank you very much!
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Any idea on removing the stripped screw and the locktite?
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Any idea on removing the stripped screw and the locktite?
Drill it out. Since you're going to be getting a new screw anyway, drill it out from the head side of screw. Use a 7/64 drill bit. You don't have to go down very far. Since you've already stripped the head you can try lightly hammering in the next size up Allen key. Heat is the only other thing that I know of to get locktite to release. Someone else on the forum may have a better answer for you on that part. Some penetrating oil may loosen it up if you let it sit for a while. But I don't know for sure. I've always used heat.
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Heat, patience, and an easy out.
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A little advice for when/if you're drilling the screw out. Go through the hole in the trigger guard. Put some tape on the drill bit where the trigger guard is so as to not mar it up.
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Shooters element sells replacement screws
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If you can't find any locally I have about 25 spare y.f.s made button heads that look like the factory screw, only better quality. Could send you a couple if needed
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Loctite blue or red - big difference. HBI AZ has a screw renew pack. The guy above might have a better deal if you just need the trigger pack screw.
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I took a good set of needle nose vise and twisted the head off the screw mine was welded. Then i just done away with the round nut on the inside the trigger group housing is threaded as well. Simply went to my local hardware store and bought the right screw and put it back in finished. Holds just fine but if not having the nut on the inside bothers ya just get a lock nut for it. If yours is welded the head will twist off fairly easy as long as ya have a good bite on it with the vise grips.
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Loctite blue or red - big difference. HBI AZ has a screw renew pack. The guy above might have a better deal if you just need the trigger pack screw.
Look for loctite blue 243, it's chemical resistant. Regular blue 241 melts if hit with acetone or gun cleaner where-as the 243 will not. Permatex makes similar products and is more easy found in the big box stores "like walmart" or chain automotive stores.
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Needle nose Irwin 6LN Vice grip pliers worked great for me. Get a good grip, it'll turn right out.
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Usually when this happens to me on a customers lower I'll use vice-grips and some anti loctite I picked up (can't remember the name of the product now).
I would not suggest drilling on out the bolt as that's a lot more labor intensive and can damage the lower if not done correctly.
A hardware store may have the right screw and someone has offered to send you a couple as well once you get it out.
Another option is to use a mini torch on the inside and heat up the screws threads on the inside (very carefully and not for any length of time) just to burn off excess thread lock and help the metal move a little. I would consider that your last option before sending it into a gunsmith or someone like me that does trigger work on the scorpions.
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Lowes has some interesting screws and nuts. I forgot the name of it, but there are some interesting flush fit quick release screws,
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My 2cents..... Because its a hex....get a star bit that is just barely too big and tap it into the stripped hex with a small hammer... If your able to use heat it will help a lot but be cautious of damaging other parts...if you can't use heat try rapping the driver with a small hammer as you attempt to rotate the screw.... Constant rotating pressure but don't go all mongo smash
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Are we talking about the screw right above the trigger for the pack? That things welded, not loctite. You need to drill it.
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Are we talking about the screw right above the trigger for the pack? That things welded, not loctite. You need to drill it.
Probably read the thread first ;)
OP stripped the screw on a non-world legal.