Ford F-150 / 250 / 350 / 450:

1974 Ford F250 lug nuts

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#1 2/18/2012 4:34 PM

larry_sanders
New member
Registered: 2/18/2012
Posts: 1

1974 Ford F250 lug nuts

I am the proud owner of a 1974 Ford F 250.  I purchased the truck about 12 months ago.  It has about 50,000 miles on it and is in good working order.

The brake light came on the other day, I noticed the master cylinder was low.  I added fluid.  The light came back on and off.

I looked under the truck and the rear driver side drum has fluid on it.

So I pulled out my 20 ton jack and proceeded to loosen the lug nuts.  First off I couldn't find the lug wrench, there is a small jack that is mounted in the engine compartment, but no lug wrench.


So I pulled out my socket set and it sure feels like 13/16 socket.  SO I went to Autozone, picked up universal (one side 13/16) wrench.

Back at home I tried loosening the lug nut, no way - it's not budging. No sign of rust, I tried another one - it came loose. Another one and it seems the wrench is too big?  Is that possible?  The lug nuts all look factory, maybe the wrench is too big?  I couldn't imagine it being metric in 1974.

Regardless my question is what is the correct lug nut and stem size for a 1974 Ford F 250.

Ford F-150 / 250 / 350 / 450 Recalls, TSBs and Service Information >> ALLDATA

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#2 2/18/2012 7:35 PM

TechHelp2
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Registered: 11/23/2009
Posts: 1165

Re: 1974 Ford F250 lug nuts

The research I have come up with is that the heavy duty Ford trucks would most likely have metric nuts and stud size. If the 13/16ths didn't fit and the 3/4 didn't fit then the only thing to fit would be a 20 to 21 MM nut size. The stud size would most likely be 14 MM.


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