size and threading for rack and pinion pressure hose mount stud and nut (2002 XLT 4.6L 4WD)

[LMHmedchem]

I am changing out the pressure hoses on my rack and pinion. The new hose comes with the bracket plate that secures the two fittings into the rack. The plate slides over a stud on the rack and is then secured with a flange nut. I can't seem to find the old flange nut, but I was going to replace it anyway. It runs up the cost a bit but at this point I replace every bolt and nut that I remove, usually with black phosphorous hardware.

At any rate, I thought that the stud was M8-1.25 but I tried a M8-1.25 nut and it doesn't go on very well. It seems like it starts to thread but won't go down the stud that I can tell. I really don't want to force it without knowing it's the correct hardware. Maybe the thread pitch is only 1 instead of 1.25. I assumed that it was 1.25 because it's 1.25 (coarse) for most auto applications and its hard to find class 10 nuts with the fine threading.

The stud doesn't look like it 's anywhere near big enough to be M10 and it's definitely not M6 or M7. I tried a 3/8"-16 for kicks but it's not that either.

I guess I could go out and get a M8-1.0 nut and see if that works but it may just be that some force is required to spin it down. I don't think its supposed to be distorted thread or anything exotic like that.

Suggestions would be appreciated,

LMHmedchem

 

[LMHmedchem]

It turns out that the correct size is M8-1.25. I was just being overly squeamish about tightening down the nut. I just didn't want to risk breaking a part that would require me to remove the rack and pinion to fix.

I tried an M8-1.0 and that didn't thread on really at all so I used a long handle socket wrench to give me some leverage and gently applied some pressure to the M8-1.25 flange nut. The nut quickly moved through whatever it was binding on and I was able to spin it all the way down. There must have been something on the threads like a little paint, or old threadlock, or something, that the nut was getting hung up on.

Thanks for checking out the thread.

LMHmedchem

 

[donalds]

Thanks for the update and information to!