Does anybody know the size and pitch of the nuts that hold the subframe onto an fc? I have everything ready to install, but i do not have any of the nuts to bolt it up. Just need the size so i can go get some new ones.
-Thanks in advance.

 

Nobody knows this? Does anybody know where to find it?

 

How did you take it off? You didn't keep the bolts?
Get underneath and try some random bolts. There aren't too many you'd have to try. Probably M12/14 x 1.5

 

He bought the subframe from me.....for a car that didn't have one (i.e.-bare shell). Hi Andy!
I believe they are M14 x 1.5, but don't hold me to that.

 

INFO:
the subframe mounting bolts and the DIFF Pin mounting bolts may look the same but they are NOT.
I found that out Unfortunately.My diff pin is almost wrecked because of a Wrong size pitched nut on there..the nuts are a Locking type nut.(inside taper)
My suggestion is to go ahead and Get MAZDA to order you the darn things..they are like 5 bucks a nut but at least you will not Screw up anything.
Order 2 for the Subframe mount plates( the plates that are also held on by 2 14mm nuts)
and the 2 for the Diff pins.( the ones that hold the Diff to the Car).

 

Thanks jesse! i will hopefully have it rolling this weekend!

 

i agree on the ordering them from mazda also, i think they may be a higher grade nut than you can buy in a hardware store for the most part also. i actualy had a nut that threaded onto the diff mounting pin, but not one for the subframe mounting pins.

 

I will add one more thing to this. For anything under the car, the holes can gunk/rust up and will not take any bolt. I had a hard time putting my front anti-sway bar mounts on because no matter what bolt I tried, nothing was threading. Tried all the pitches: 1, 1.25, 1.5. Nothing worked. It turned out I had to clean/chase the threads with the proper tools and I finally got the bolts in perfect.

This probably doesn't apply to the subframe because I doubt you drove around with no rear differential, but you get what I'm saying

 

lemme go look i had to re-thread mine and ordered a die. I dont believe the sizes mentioned in this thread are correct.

edit: it is M12x1.25 Good luck!