The Ford Barn

JAS1949 · 03-16-2021, 09:30 AM

Hi Again Guys, I have a 1937 steering box I'm installing on a 36. Rebuilding it now. 1st couple threads were smashed when I took the nut off the steering sector shaft it turned the threads bigger than the original. would like to rethread. I have another nut. Wondering if anybody knows thread size on shaft. I think it's 7/8 x 20 or 24 can't tell. Sure do appreciate all the help I've received on this restore.

1948F-1Pickup · 03-16-2021, 12:30 PM

If the same thread is used on 37-48 passenger sector shafts as on the 48 truck sector, it's 7/8-14. The Ford part # for that particular nut is 351153-S.
Thread pitch gauges are really cheap.... and indispensable.

rockfla · 03-16-2021, 12:41 PM

AND "IF" its 7/8-14 that is the "Standard" pitch for NF thread SO depending on the "type" of nut (or tap/die) it shouldn't be too difficult to find.......IF it is a "die" you seek......MY local NAPA store had it!!!!

1948F-1Pickup · 03-16-2021, 01:53 PM

Here's what's in the green bible.....
351153-S Nut 7/8-14 (Pass, Comm 1932-35. Trucks except 122" 1932-47)
351155-S Nut- Castle 7/8-14 (Pass 1935-48. Comm, 122" Truck 1935-47)

bobH · 03-16-2021, 02:04 PM

When I was faced with that problem, I used a split factory nut, put it over the good threads, welded the split back together, used heat on the smashed threads, and slowly and carefully backed the nut off, reforming the mashed threads in the process.
Just an idea, that worked for me. I have also been told that it is possible to buy a "split reforming die". (I haven't looked for that.)

Mart · 03-16-2021, 04:52 PM

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I have split a die before now, and wound it off the thread from the other side of the damage.
I wouldn't want to buy an expensive one, but some of the imported tap and die sets go up that big and are not a lot of money.
To be honest a 14 tpi thread could probably be cleaned up nicely with a small three cornered file.

Mart.

Kerk · 03-16-2021, 05:00 PM

I have THREAD File which has saved me many times.. It gives me 8 choices to cleanup damaged threads and I would not be without it.kx

JAS1949 · 03-17-2021, 10:24 AM

Thanks Guys for all the info. Had the die in my box. Worked great. Another step forward. Thanks again.

03-16-2021, 09:30 AM	#1
JAS1949 Junior Member Join Date: Sep 2010 Location: Theodosia, Mo Posts: 21	Thread Size Hi Again Guys, I have a 1937 steering box I'm installing on a 36. Rebuilding it now. 1st couple threads were smashed when I took the nut off the steering sector shaft it turned the threads bigger than the original. would like to rethread. I have another nut. Wondering if anybody knows thread size on shaft. I think it's 7/8 x 20 or 24 can't tell. Sure do appreciate all the help I've received on this restore.

03-16-2021, 12:30 PM	#2
1948F-1Pickup Senior Member Join Date: Oct 2015 Location: Socal Posts: 795	Re: Thread Size If the same thread is used on 37-48 passenger sector shafts as on the 48 truck sector, it's 7/8-14. The Ford part # for that particular nut is 351153-S. Thread pitch gauges are really cheap.... and indispensable.

03-16-2021, 12:41 PM	#3
rockfla Senior Member Join Date: Mar 2014 Location: Jacksonville FL Posts: 3,951	Re: Thread Size AND "IF" its 7/8-14 that is the "Standard" pitch for NF thread SO depending on the "type" of nut (or tap/die) it shouldn't be too difficult to find.......IF it is a "die" you seek......MY local NAPA store had it!!!!

03-16-2021, 01:53 PM	#4
1948F-1Pickup Senior Member Join Date: Oct 2015 Location: Socal Posts: 795	Re: Thread Size Here's what's in the green bible..... 351153-S Nut 7/8-14 (Pass, Comm 1932-35. Trucks except 122" 1932-47) 351155-S Nut- Castle 7/8-14 (Pass 1935-48. Comm, 122" Truck 1935-47)

03-16-2021, 02:04 PM	#5
bobH Senior Member Join Date: May 2010 Location: so cal, placerville, vegas Posts: 1,394	Re: Thread Size When I was faced with that problem, I used a split factory nut, put it over the good threads, welded the split back together, used heat on the smashed threads, and slowly and carefully backed the nut off, reforming the mashed threads in the process. Just an idea, that worked for me. I have also been told that it is possible to buy a "split reforming die". (I haven't looked for that.)

03-16-2021, 04:52 PM	#6
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,749	Re: Thread Size Sponsored Links (Register now to hide all advertisements) I have split a die before now, and wound it off the thread from the other side of the damage. I wouldn't want to buy an expensive one, but some of the imported tap and die sets go up that big and are not a lot of money. To be honest a 14 tpi thread could probably be cleaned up nicely with a small three cornered file. Mart.

03-16-2021, 05:00 PM	#7
Kerk Senior Member Join Date: May 2010 Posts: 642	Re: Thread Size I have THREAD File which has saved me many times.. It gives me 8 choices to cleanup damaged threads and I would not be without it.kx

03-17-2021, 10:24 AM	#8
JAS1949 Junior Member Join Date: Sep 2010 Location: Theodosia, Mo Posts: 21	Re: Thread Size Thanks Guys for all the info. Had the die in my box. Worked great. Another step forward. Thanks again.