M6 3mm grub screw

[Neu]

So I have a breech that the barrel grud threads stripped out, the next size up to re-tap it is for a M6 grub. I can not find a short enough grub that will not block the dove tail it needs to be 3mm length. Any help would be appreciated in sourcing one that short.

 

[Richely]

Shorten a longer one?

That would be my approach if I couldn’t find one short enough.

 

[goral13]

Hey Neu try these folks https://www.mcmaster.com/
Also post a pic of the screw and situation(I am more of a visual guy, if I see it I get ideas).
I have a small machine shop (5 lathes, milling machine, surface grinder and any tool I can think off) whenever I get into a situation where I need a specific bolt or screw or tap McMaster has it and if it's not listed on their website, call them (very helpfull folks)

 

[goral13]

Found something like this M6 3mm set screw. not sure if this is what you are looking for

 

[Neu]

View attachment 350754
Found something like this M6 3mm set screw. not sure if this is what you are looking for


Her is a pic those are m6 x 6mm the shortest length I could track down was 5mm the original m4 screws are 3mm length.

 

[goral13]

Ok I see, so you already re-threaded to M6. Mcmaster has M5 2.5mm btw. You can always file the M6 down to proper length. I do it all the time on a belt grinder or turn them down on a lathe, not sure hows your tooling situation but if you need them to sit flush you can file them down with good file.

 

[Neu]

Ok I see, so you already re-threaded to M6. Mcmaster has M5 2.5mm btw. You can always file the M6 down to proper length. I do it all the time on a belt grinder or turn them down on a lathe, not sure hows your tooling situation but if you need them to sit flush you can file them down with good file.

Yeah it was so stripped the m6 was the smallest I could use, I'll pick up something to grind those ones down as you suggested. Thanks for the help.

 

[goral13]

Hint. Pick up a m6 nut or 2. Screw the M6 grub screw in, and then place it in a vise. Or any flat stock you could use, drill a hole and tap it to m6.
Make a fixture to file it down. Don't hold the screw by the threads with anything, so you don't damage the threads.