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You need a damaged screw extractor, something like this.
I've used most of these methods to remove stripped screws and they all work pretty well.
You can also buy a small drill bit for removing stripped screws that does wonders. This guy right here: [link]
Here is the extractor set I think would work if all else fails. I think there is enough meat left on those screws that you would be fine with the right tool but if not. here is the link for the extractor set
There is a stripped screw bit that counter sink drills into the stripped screw as the bit turns.
Similar to this.
Lowes, depot, ace, dixieline, osh will all have something like this.
Edit. Super glue will adhere better to a rough surface
Edit 2. Rubber band works best when you are applying all the force you can while only very slowly turning the driver.
I haven't used one on a gun, but easy out screw extractors have saved me when repairing bikes.
They are self tapping reverse threaded screw that you drive into the stripped head.
Link is for an example, not because I know that is a good version. [link]
Try jamming a Torx bit in there. If that doesn't work, look in to extractor bits.
These things are awesome. With a bit extender, you can probably get into a deep hole.
Damaged Screw Extractor Kit and Stripped Screw Extractor Set. Its A HassleFree Broken Bolt Extractor and Screw Remover Set [link]
There are drill bits made for extracting broken or rounded bolts. I bought a small set 10 years ago and have used them many times.
It's a set identical to these.
I have a set like this and it essentially drills out a bit of the screw so you can flip the bit and it will grab and remove it. Super handy to have around.
Edit: Not sure if this one is small enough for that screw, but I bet there is a set for that size somewhere.
Screw extractor bits are handy to have; they're designed to make an even shaped hole (possibly not needed here for a stripped hex head) and then the other end will bite in and remove the screw.
Otherwise it really depends what tools you have available; you could do anything from grinding a slot for a large screwdriver to drilling out the head entirely to spot welding a piece of metal to it that you can turn or just finding something that wedges in tight enough to turn it.
This kit has saved my ass multiple times when dealing with Benchmade's lead-based screws. Just make sure there's a correct sized bit, there's a lot of kits available like it, I'm just giving the first one I found as an example.
Best $13 spent when you regularly build anything that involves screws
Stripped Screw Extractor
I highly recommend this set.
They come in a cobalt option if you can find it choose that one. If not any of them are good enough.
They really are amazing and can handle these small screws.
Screw extractor. Here's an example link. You'll still want to prep it by using some penetrating oil like "Liquid Wrench".
If that doesn't work then drill them out. You'll probably have to clean up the threads with a tap. If the thread area is destroyed then you'll have to use a larger drill and tap for the next size up of thumbscrew.
Use a screwdriver instead of a hammer next time.
I'd try something like this, but you're really in a bad way here.
That scratch would have to be pretty deep to break the contacts of copper. Hard to tell.
Here ya go, OP
They make screw extractors just for this kind of thing. You won't even need to drill out the socket as you've already got a hole to start with. Yeah, Amazon wants $12 for it. Your local hardware store probably has one in stock for $20. Since you've already gotten the screw out by now, you may as well order the cheap one so you'll have it next time. Because there will always be a next time. ;-)
Yeah that's a hard one. I'm pretty good at drilling and tapping but I'd worry about how far to drill in too. You could try a screw extraction bit first that don't always work but it would be worth a try.
If you drill it out I'd probably use a #30 bit. But that would be just for an m5 screw. Go really slow. A couple turns then wait for it to cool down. Stainless heats up fast then hardens. It will ruin your bit and make it harder to drill. Then rethread it with a plug tap.
You can try using some pliers to grab the end of the part and try to unscrew it out. I’d spray some Kroil, PB blaster or WD-40 on it before to help it come out easier. If you can’t grab it with pliers a screw extractor will work. here is a set off amazon I’m pretty sure you can find these at almost any hardware store. They come in handy when stuff like this happens.
Heres what I could think of:
Use one of those things for removing damaged screws, if they go this small. For example:
Amazon - screw extractor
Dremel a little slot in them? Of course, you'd ruin your handle scales.
Super glue or epoxy the torx key into screw. S.G. would be easier to undo for multiple screws and to clean off the knife.
As above, but a little dab of solder
First try a thin rubber band between rounded hex bolt and Allen key.
If too thick, try a piece of latex glove. This method is better than tin foil.
If these fail try the other methods mentioned. Cutting a slot in the head with a dremel remove with straight screwdriver best. And yes as mentioned, a Torx bit beat into the rounded hole may also get u out of this situation. Lots of good help here. ; )
If all else fails, weld a rod onto the head, twist off. ; ) but yeah... that's overkill... and best for big heavy duty bolts.
U can try these:
Or instead of a rubber band, try cutting a small piece from a latex glove
Or try a small flat blade screwdriver, but punch it in if u can first. Get good straight pressure to break it loose first shot.
If u can slot it with a Dremel, that would be best.
Tiny vise grips if u can clamp on the outside.
Can also tap it around (unscrewing it slowly but surely) with a small chisel.
U can also use high strength epoxy and a small rod on it.
Big stuff u can tack weld a rod or another nut on top.
I carry this tool with me all the time.
It’s one of the only as seen on tv things that is actually genius.
Cheap and easy I promise it will work.
Or just get yourself a set of these. Best $13 you’ll ever spend.
You'll want to use a screw removal kit. You'll have to find the right size to use, but they're really effective at removing stripped screws. Obviously you will need to find a new screw for the machine afterwards. This method does destroy the screw more, but it's unusable already, so no harm there. Here's an example of what they look like so you have a decent starting place: https://www.amazon.com/Extractor-Stripped-HassleFree-Hardness-63-65hrc/dp/B07GZ17QD9
Mercs mechanics need to get one of those screw extractor from Amazon...
There are specific bits for removing stripped screws. Look for one of [these](https://www.amazon.com/Extractor-Stripped-HassleFree-Hardness-63-65hrc/dp/B07GZ17QD9) sometimes you can find single bits in just the size you need but the sets are nice to have
You could just use one of those screw extractor bits to cut right through the paint since you're tossing them anyway.
Get one of these
get a set of something like this:
at Home Deport or Lowes. They're handy for more than just broken nozzles.
Your best shot may be to get something like this: [link] .
It has one end to make or widen a hole, then the other end has a reverse twist to latch onto and screw it out.
Do you have any torq bits? Their star pattern can sometimes grab a screw like that. Otherwise grab a screw extractor off amazon.
Get a stripped screw remover bit: [link]
Then get a replacement screw.
That happened to me on 3 of the exact same screws on the spin segway max's. I bought this:
it didn't work as advertised. So.... don't buy that lol.
You need something like this…
use a dremel to make a slot then take it out with a flathead.
Or a screw remover.
Screw extractor kit
I use a stripped screw remover for stuff like this.
You can get them locally at hardware/home supply stores.
This screw extractor set is pretty good to have around just in case. Has saved me from grief a few times.
My nephew had an accident on his bike and ground flat the bleed screw! I successfully removed with a damaged screw extractor kit.
As for where to find a replacement, first you need to find the correct part number as Shimano has multiple versions of this screw. Go to https://si.shimano.com/#/, enter your brake model number, and click on EV (exploded view) document. The part number will be on the sheet. If you can't obtain part from LBS or your favorite online seller, try ebay.
you can try something like this or this. just don't drill too deep.
Get one of these screw extractors: https://www.amazon.com/Extractor-Stripped-HassleFree-Hardness-63-65hrc/dp/B07GZ17QD9. Simplest and cleanest way to remove the screw.
I have had decent luck with a screw extractor kit. Can you post a pic? That may help.
If you’re not too steady with a dremel cut off wheel, get a set of this to remove the screw with out damaging the paddle.
Screw extractor - Amazon, or check your local HD or Lowes. [link]
fwiw, I stripped one of the hex screws on my old hubmotor cover and used the Craftsman version of this to get it out. I was skeptical, but it worked like a charm. Ace Hardware had direct replacement screws. https://smile.amazon.com/Extractor-Stripped-HassleFree-Hardness-63-65hrc/dp/B07GZ17QD9/ref=sr_1_3?crid=2EZENVCCNI85K&dchild=1&keywords=screw+extractor+set&qid=1603602188&sprefix=screw%2Caps%2C209&sr=8-3
There’s a special drill bit you can use (can order from Amazon.
You can use a metal saw blade or anything similar.
Otherwise, a striped screw remover ([link])
Lemme just leave this here.
Something like that'd do the job, IMO.
A screw extractor set can come in handy.
The make screw extractors.
Sorry for the tardy response. I went to amazon and bought this. It removed the stripped screws fairly easily.
Set on amazon, you don't have to get those but that should work for you
They make screw extractor tools that drill into the screw and bite into the damaged head enough to remove it. $11 on Amazon for a basic set. [link]
The specific one I bought isn't available on Amazon anymore, but this one looks pretty much the same:
I have taken out a few striped ones on my krytac with a specialized drill bit extractor for stripped screws...with a decent drill/electric screwdriver and patience it works.
Now updated all screws to stainless steel...