Author Topic: The 3mm die-cast head trigger pack screw  (Read 257 times)

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Offline briang2ad

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The 3mm die-cast head trigger pack screw
« on: January 21, 2023, 03:41:14 PM »
I tried to get the trigger pack apart on my Scorpion. 

OK - my Allen keys are not marked so I had a slightly smaller than the hex head screw (3 mm) in the bottom of the trigger pack.  It instantly stripped the head.  Anyone know a fix?

If not, it will be going back to CZ.  What a pain.  They use very soft metal for their hex heads. 

Offline George16

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Re: The 3mm die-cast head trigger pack screw
« Reply #1 on: January 21, 2023, 03:46:21 PM »
Send it to CZ.

Offline Trooper894

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Re: The 3mm die-cast head trigger pack screw
« Reply #2 on: January 21, 2023, 04:12:49 PM »
Are you talking about the screw that holds the trigger pack into the lower receiver? If so, that is easily remedied with the kit from HB Industries.
https://hbindustries.net/store/shop/carbide-drill-for-scorpion-trigger-pack/

They even have a tutorial video to walk you through the process. Taking your time & it still is a 5 minute fix.
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Offline briang2ad

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Re: The 3mm die-cast head trigger pack screw
« Reply #3 on: January 21, 2023, 05:23:42 PM »
Mine is not welded.  Just a warning.  The head of the screw you need to take out is in tight, and is made of very cheap steel - I've never seen an allen head this soft. 

Offline Trooper894

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Re: The 3mm die-cast head trigger pack screw
« Reply #4 on: January 21, 2023, 07:12:26 PM »
The screw heads are not only soft but CZ is well known for slathering on huge loads of thread locker on those screws. I don't recall either of my trigger packs being welded but they both had gobs of thread locker applied to the exposed threads of the screw inside the trigger pack. Both of my trigger pack screws had to be drilled out due to the tiny, allen head stripping out. The HBI drill bit was put to good use on both of mine and a friend's also. After I got the HBI kit, I was able to source additional appropriately threaded screws at the local hardware store. 
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Offline briang2ad

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Re: The 3mm die-cast head trigger pack screw
« Reply #5 on: January 25, 2023, 03:00:23 PM »
The screw heads are not only soft but CZ is well known for slathering on huge loads of thread locker on those screws. I don't recall either of my Both of my trigger pack screws had to be drilled out due to the tiny, allen head stripping out...

I MAY send mine to HBI - not CZ. 

Offline Asylum9

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Re: The 3mm die-cast head trigger pack screw
« Reply #6 on: January 26, 2023, 02:05:31 PM »
Just drill it out. Don't go through the the top, thats a pita. Go through the trigger guard. The drill bit Dia is slightly larger than the provided access hole so it'll be enlarged slightly but makes getting that screw out much easier. On the plus side, it's very soft metal and easy to remove the screw head.
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Offline Trooper894

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Re: The 3mm die-cast head trigger pack screw
« Reply #7 on: January 26, 2023, 02:54:57 PM »
Also the stripped out allen socket in the head of the screw works as a perfect center for the drill bit. All you need to do is drill deep enough that the head of the screw pops off, then you can remove the trigger pack. Then go at the remaining threaded stub from top or bottom with a pair of tightly clamped vice grips to screw it out or all the way through. Once you get the trigger pack removed it also allows you to chip away the glob of thread locker, if present, and allows you to get in and apply some heat to release the thread locker, if present. It is not difficult and can be done with a cordless drill in minutes, just go slow.
Honor - Doing what's right, even if no one is watching.

 

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