M10x1.25 Rivet nuts? Having trouble locating them. I don't think they exist?

Do M10x1.25 Rivetnuts not exist? I took off my oem tow hooks off my Integra today to replace them with ones that aren't bent and one of the welded nuts broke off. I was thinking of using with a rivetnut, but from searchig online, it seems all I can seem to find are m10x1.5 and m10x1.75. I really want to keep the types of bolts on my car consistent with JIS m10x1.25 bolts. The tow hook uses three bolts holding it. I think using two would be ok for most uses, but I'd like to have the third bolt on. Worst case is I need to use an m10x1.5 bolt or cut the frame area to put a nut behind there, but I was looking to avoid cutting. 

The only other post I've found relating to this was on ih8mud which seems to be the same issue I have been encountering

https://forum.ih8mud.com/threads/m12-and-m10-rivnuts-in-our-sizes.1220085/

Hoping maybe someone on here as a lead? Looking on Amazon, ebay, Mcmaster, etc doesn't seem to result in finding any. 

Odd but you seem to be right.

Me, I would chase a 1.25 tap down the 1.5  after install and call it a day.

I would check with Fastenal.  Quick look at their website shows m10x1.25 capscrews, didn't find any rivnuts. May contact their tech department.

NOHOME said:

Odd but you seem to be right.

Me, I would chase a 1.25 tap down the 1.5  after install and call it a day.

I gave this a shot on a few of the 10x1.5 rivenuts I ordered and it worked. Going to install it later on when Im done with work and the rain hopefully stops. Thanks

aw614 said:

NOHOME said:

Odd but you seem to be right.

Me, I would chase a 1.25 tap down the 1.5  after install and call it a day.

I gave this a shot on a few of the 10x1.5 rivenuts I ordered and it worked. Going to install it later on when Im done with work and the rain hopefully stops. Thanks

Wait, what?  That's a thing you can just do?

I'm not sure, in fact, I am actually very sure...

I would not trust a rivnut for something that requires an m10 bolt.

Just get an m10 flanged nut, drill the hole so the nut goes into the part and then weld the flange.

WAY better than a rivnut, and not really any more difficult, and cheaper.

In reply to wvumtnbkr :

in the case of a tow hook, I think id also opt to reweld the nuts on.  And skip the riv nut idea

Just to make sure, is it still sketchy even if two out of the three welded nuts are still on? I was not comfortable cutting into the frame and then sticking a nut and welding it back on. But also wondering, is the load strength of the rivetnut  much lower than a bolt and nut? 

Didn't realize this would be an issue. 

In my opinion, rivnut are not strong at all.  Do you plan on ever actually using the towhook?  If so, make it beefy.

You don't really need to cut into the frame.  Just drill a big enough hole so a flanged nut can fit the hex part into the hole.  The flange should stick out and you can weld the flange to the frame.

If you don't want the slightly raised part of the flanged nut to stick out, you can use a hammer to slightly dimple the area before welding the nut.

After having soooo many rivnuts fail (either pull out or spin), I started using flanged nuts as I describe above.