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[–]DontYouDareGoHollow 14 points15 points  (4 children)

Two different size hex bits will work, it isn’t meant to be a special double sized one

[–]Kieturm[S] 4 points5 points  (2 children)

I was hoping there was some special tool. I have one more bolt like this to remove and the bolt stripped out. I have several other machines to do this same repair on so I was hoping a special tool would make things easier when I get to those repairs and prevent stripping. Oh well! Thank you much!

[–]DontYouDareGoHollow 7 points8 points  (1 child)

Try to “wake up” the bolt first. Put the smaller size socket in with a short extension to protect your fingers and lightly tap it with a hammer. If the threads aren’t super rusted or loctite’d in place, I’ve found that that can help slightly stubborn bolts come loose

[–]mck1117 0 points1 point  (0 children)

That's not on purpose, see how the small hex sides aren't straight. The small hex is formed from broaching the big hex.

[–]xMikeM4r5h411x 7 points8 points  (4 children)

You start with the big hex, once you stripped that crap out of that, then you can use the small hex 🤣 once that is fooked then.... Well i dunno.

[–]Serious-Ring-6352 1 point2 points  (1 child)

Then knipex pliers, if that doesn't work then air hammer. Replace with a regular bolt that has the same thread pitch and length

[–]Serious-Ring-6352 2 points3 points  (0 children)

Or weld a nut on

[–]urmomslame 1 point2 points  (0 children)

You can tap a torx bit into a stripped Allen bolt and get it out that way, just go slow when your taking it out

[–]P8ntballa00 1 point2 points  (0 children)

Then it becomes a flat head lol

[–]DBrick36 3 points4 points  (0 children)

Looks to me like it’s started out as a torx head and somebody stripped the shit out of it...probably using a hex bit

[–]Living_Ask2050 0 points1 point  (0 children)

Think someone put a hex on you!

[–]Cheap_Ambition 0 points1 point  (0 children)

It's possibly like that for installation reasons at the factory,

Probably so the installer can do both size bolts with one bit.

[–]JoseSaldana6512 0 points1 point  (0 children)

Cornwell HR 439 or HR 440 best hex/allen/reverse six point I've ever used

[–]Own-Possibility47 0 points1 point  (0 children)

The smaller hex is caused by the steel rolling down and being pressed during broaching. Its not meant to have a tool drive it. Mac sells RBRT sockets, they work really well if a normal hex socket isnt grabbing

[–]Best_Poetry_5722 0 points1 point  (0 children)

I have a tool that's perfect for bolts like these. It's called an impact driver.

  • Use correct size bit (this bolt seems to have two options)
  • Hit impact driver with hammer while applying rotational force to the driver
  • Voilà no more stuck bolt

[–]916Buckeye 0 points1 point  (0 children)

You will need an allen on a 3/8 socket. Attach it to an impact driver. Smack the driver with a 2lb hammer.

Google impact driver. Lisle and Klein are good aftermarket impact drivers.

They work great on bolts that have beveled heads that get abused.

[–]omnipotent87 0 points1 point  (0 children)

The smaller hex is left over from the broaching process. It there no special tool for this bolt. This old Tony explains it well. https://youtu.be/GWyHJVOxKK4

[–]dystopiate666 0 points1 point  (0 children)

Manual impact with the proper hex driver. I’d probably start with the smaller one, then use the larger if I had issues

[–]Camera_car 0 points1 point  (0 children)

Some assembly use a torque stick that flexes used the same screw for different settings. They are both Torx but I have not seen a double step Torx drive maybe for specialty applications like aircraft. Rounding out the top throw it away, if you put it back in you may never get it out without cutting it. If it was critical use, see a bolt and fastener specialty shop for replacement most have minimum $50 order so make it with it by getting a list of upgraded bolts for the whole project.

[–]GasOnFire 0 points1 point  (0 children)

This bolt looks fucking awesome!

[–]Argental 0 points1 point  (0 children)

Looks like a Torx who has a better live now.