Where to get unusual size allen bolts?

[Rickenbacker]

More exactly - where can I get an M7x70mm allen bolt?

Nowhere - that's where...

[rancidtom]

Stainless or not?

[rancidtom]

M7 x 60 in stainless here if that's any use?
http://stainlessmiddleton.co.uk/32-socket-screws

[Rickenbacker]

Cheers Tom, but 60mm won't do.

Material doesn't really matter too much, though stainless would be nice.

It's a long stock bolt for a FT stock.

I can get M7x70mm in a hex bolt, but I'd have to try to put a screwdriver slot in it, which ain't going to end up looking very pretty.

That's because I couldn't get a slim 11mm socket in the recessed stock bolt cup, to do up the hex.

[rancidtom]

If you know somebody with a lathe ask them to turn the hex head to round (diam to suit the stock hole) and then drill a 5.1mm hole in the centre. You can then use a sacrificial 5mm hex bit to drive into the hole broaching a hex socket in for you. You need a 5.1mm drill to allow a little bit of clearance for some metal to move and not grip the hex bit too tight to allow removal. Seeing as it's a stock bolt and not holding a wheel or wing on something an 8.8 grade bolt will do, they're easy enough to machine and to broach.

[--ped--]

easier to rethread a m8 to m7

[T 20]

I can get M7x70mm in a hex bolt, but I'd have to try to put a screwdriver slot in it, which ain't going to end up looking very pretty.

If all else fails, Phil, I can make one and post it to you.

[maximus]

Counter bore the hole in the stock so you don't need such a long bolt

[bighit]

bmw use 7mm a lot in their engines.

could you get a bit of 7mm thread welded on to a m8 allen head bolt?

m7x65mm https://www.clampcouk.co.uk/exhaust-...s-10-pack.html
https://www.clampcouk.co.uk/media/ca.../b/r/br398.jpg

get the rounded bit under the head of the bolt turned down a bit and it may give a bit more length.

[rancidtom]

M7 is found on motorcycles, scooters and pushbikes, rarely long stuff though, usually 25mm for holding ignition rotors and similar stuff.
M7 is 1mm pitch, so is M6, try fitting a 6mm helicoil and using an M6 hex bolt, 70mm length is available. Seeing as it is only a stock bolt M6 will be strong enough, fit the helicoil correctly and again it will be strong enough, I would suggest using a 1.5D length, you will need to run a 1/4" drill down the existing M7 thread, seeing as it is 1mm pitch the helicoil tap will run in very easily as you will only be cutting a few thou with the tap. You may need a washer as the M6 hex head will be smaller than the M7 one you are replacing.

[angrybear]

Cheers Tom, but 60mm won't do.

Material doesn't really matter too much, though stainless would be nice.

It's a long stock bolt for a FT stock.

I can get M7x70mm in a hex bolt, but I'd have to try to put a screwdriver slot in it, which ain't going to end up looking very pretty.

That's because I couldn't get a slim 11mm socket in the recessed stock bolt cup, to do up the hex.

Easy answer; drill/ream out the stock cup until you can fit a thin wall socket down it, you can also turn/file/grind a socket down ultra thin as a specialist tool or try a nut driver as they're usually much thinner walled than a conventional socket.