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Old December 23, 1999, 05:48 AM   #1
deanf
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What are these screws called, so I can buy a screwdriver for one? Thanks.

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[This message has been edited by deanf (edited December 23, 1999).]
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Old December 23, 1999, 06:42 AM   #2
George Stringer
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Dean, this is something I haven't seen yet. The only Mossbergs I've worked on have had phillips screws in the safety. It might be a torx head. If it looks similar to an allen head then it's a torx. George
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Old December 23, 1999, 07:55 AM   #3
deanf
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Thanks. No it's not a torx. It's the kind of screw you can tighten with a slot head screwdriver, but then you can't loosen. Seen those tamper proof screw heads in public restrooms? It's like that. I have one on my 500 in .410 that's about 10 years old, and on my 590 12 ga, which is a bit newer.
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Old December 23, 1999, 03:20 PM   #4
James K
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I didn't recall those being used on the Mossberg, but the quick answer is you can't buy a screwdriver, which is why they are tamperproof.

When the head is exposed, you can cut a slot with the cutting wheel of a Dremel tool, and use a regular screwdriver. Otherwise, you have to drill them out or use a broken screw extractor.

Jim
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Old December 23, 1999, 06:41 PM   #5
deanf
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Hmmm. So I guess the next question would be: Why would they build them with a screw you can't take out?
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Old December 23, 1999, 07:49 PM   #6
HankL
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It's because they don't trust you to be messing with the safety. I had to go through it once on my brother inlaw's Mod. 500. The safety didn't work from the factory and they didn't want to send me the replacement parts!
I was right before some hunting season and we didn't have time to deal with a repair center. I finnally convinced Mossberg to sent the parts. As I recall, I had to booger up the anti tamper screw to get it out but I had a brand new one in hand that came with all of the other safety parts. If you really need to take it apart Brownells has new screws as well as the other safety parts.
Good Luck,
Hank

[This message has been edited by HankL (edited December 23, 1999).]
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Old December 23, 1999, 07:55 PM   #7
Mike Baugh
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They actually do make a screwdriver for these screws . It resembles a nut driver with a slotted screwdriver in the middle . You have to press hard on the screw when you remove it [this keeps the blade in the screw slot] I have always been able to remove these with a well fitting straight screwdriver by pressing firmly , and keeping the blade centered in the screw head while turning slowly , be careful not to slip and stab yourself . These are called "Tamper Proof Screws" . Good luck , Mike...
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Old December 23, 1999, 08:49 PM   #8
George Stringer
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Oooooh! That kind! Dean, if you were to clamp the receiver in a padded vise I believe you could get the screw started out with a small drift punch. George
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Old December 23, 1999, 09:35 PM   #9
HankL
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George hit the nail, er screw on the head!
Dean, why do you need to take it off?
Hank
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Old December 23, 1999, 10:41 PM   #10
deanf
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well the safety button on the .410 broke off a few years ago, and I'd kind of like to get the gun back in service. It appears the screw must come out to install the new button.
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Old December 24, 1999, 12:01 AM   #11
HankL
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Go for it Dean, If the button is broken all the way off you might be able to get a needle nose on it and save the screw. Please check with Brownells to make sure you get the right parts as some are listed differently for the 410.
You have got em scared now!
Hank
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Old January 12, 2000, 09:00 PM   #12
HankL
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I ran across this today while looking for someting else in a McMasters-Carr catalog.
Round Head One-Way Screw is the name of the beast. They sell a One-Way Screw removal tool that looks like a button spanner on the end of a screwdriver for around 16 bucks.
They do say that if the screw was installed by machine "tightly?" you will still have to resort to GUNSMITIN
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