The Ford Barn

gp1941 · 05-03-2019, 04:53 PM

Help Please,

Working on a 1941 4 cylinder. My Parts Manual calls for a LOCK NUT # 355823 S7 to lock the stationary point in position after setting the point gap.
Can someone help with the nut size and threads per inch.

THANKS!

34PKUP · 05-03-2019, 06:25 PM

Why not just measure to fit the bolt/stud that the nut is supposed to fit?

Kurt in NJ · 05-04-2019, 02:21 AM

Try on a 8n,9n tractor site, that was the original use for that engine

Terry,OH · 05-04-2019, 06:26 AM

Looked through the parts book diagrams and do not find the lock nut in question on the point plate or any where else. List of special parts and it is not located there either. In my book (2) 355047-S screws hold the stationary point in position. These are the same screws used on the V8 distributor for the same purpose. 8-32 x 3/16" Fillister head with captured lock washer (external star type)

51 MERC-CT · 05-04-2019, 06:44 AM

Yep, not a nut to be seen in this illustration.

gp1941 · 05-06-2019, 09:49 AM

Sponsored Links (Register now to hide all advertisements)

Gentlemen,
What I have is 1941 Ford built Jeep. It uses the 4 cyl truck/tractor engine with some major changes; down draft manifold with a Holley carb, a cam operated fuel pump, a right angle drive distributor housing with a Holley distributor. And a host of other government required changes. The problem is the points have been replaced over the years with non-original parts. In a attempt to determine the original set I was trying to work "backwards" the parts number of the jam nut #355823-S7 to see what the machine screw thread size is. Example; #10-32 tpi. This info should then tell me what the point thread size is.
I have no Holley Distributor manual that might reference this application. My Ford parts books also do not recognize this jam nut number.
If someone can tell me how to post a Scan or PDF file or ?? I'll be glad to do as that might help with the explanation.
THANKS for the help.

gp1941 · 05-06-2019, 09:56 AM

Lets try this;

36rgtop · 05-06-2019, 10:30 AM

Quote:

Originally Posted by gp1941

Lets try this;

Obviously without a military parts spec. book the pic. is somewhat worthless.
And if the original inquiry had provided this information it would have saved needless time trying to assist.

Kurt in NJ · 05-06-2019, 02:02 PM

Looks like a flathead point arm with a packard threaded stationary contact

cmbrucew · 05-06-2019, 04:39 PM

Try Echlin CS709 from Napa.

Bruce

koates · 05-07-2019, 03:48 AM

I would suggest you contact one of the ww2 jeep parts suppliers and buy a set of new contacts. I doubt any ford book or otherwise would list the thread size. Otherwise go to a local auto electrical shop with your sample. Many early vintage car magnetos have this type of contact. Regards, Kevin.

gp1941 · 05-10-2019, 10:24 AM

Gentlemen,
FYI, A fellow sent me a stationary point threaded #8-32tpi x 3/8" that appears to fit the breaker plate. The movable point arm does interchange with the Ford flat head. Apparently HOLLEY used an un-common fixed point. The complete internal assembly can be swapped with an Auto-Lite style and those parts are available. I will pursue the NAPA number.
THANKS very much for all the help. I'll keep you posted.

05-03-2019, 06:25 PM	#2
34PKUP Senior Member Join Date: Feb 2011 Posts: 794	Re: Distributor Point Lock Nut Why not just measure to fit the bolt/stud that the nut is supposed to fit?

05-04-2019, 06:26 AM	#4
Terry,OH Senior Member Join Date: May 2010 Posts: 4,750	Re: Distributor Point Lock Nut Looked through the parts book diagrams and do not find the lock nut in question on the point plate or any where else. List of special parts and it is not located there either. In my book (2) 355047-S screws hold the stationary point in position. These are the same screws used on the V8 distributor for the same purpose. 8-32 x 3/16" Fillister head with captured lock washer (external star type)

05-06-2019, 09:49 AM	#6
gp1941 Junior Member Join Date: Sep 2015 Posts: 25	Re: Distributor Point Lock Nut Sponsored Links (Register now to hide all advertisements) Gentlemen, What I have is 1941 Ford built Jeep. It uses the 4 cyl truck/tractor engine with some major changes; down draft manifold with a Holley carb, a cam operated fuel pump, a right angle drive distributor housing with a Holley distributor. And a host of other government required changes. The problem is the points have been replaced over the years with non-original parts. In a attempt to determine the original set I was trying to work "backwards" the parts number of the jam nut #355823-S7 to see what the machine screw thread size is. Example; #10-32 tpi. This info should then tell me what the point thread size is. I have no Holley Distributor manual that might reference this application. My Ford parts books also do not recognize this jam nut number. If someone can tell me how to post a Scan or PDF file or ?? I'll be glad to do as that might help with the explanation. THANKS for the help.

05-06-2019, 02:02 PM	#9
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,158	Re: Distributor Point Lock Nut Looks like a flathead point arm with a packard threaded stationary contact

05-07-2019, 03:48 AM	#11
koates Senior Member Join Date: May 2010 Location: Melbourne Australia. Posts: 2,079	Re: Distributor Point Lock Nut I would suggest you contact one of the ww2 jeep parts suppliers and buy a set of new contacts. I doubt any ford book or otherwise would list the thread size. Otherwise go to a local auto electrical shop with your sample. Many early vintage car magnetos have this type of contact. Regards, Kevin.

05-03-2019, 04:53 PM	#1
gp1941 Junior Member Join Date: Sep 2015 Posts: 25	Distributor Point Lock Nut Help Please, Working on a 1941 4 cylinder. My Parts Manual calls for a LOCK NUT # 355823 S7 to lock the stationary point in position after setting the point gap. Can someone help with the nut size and threads per inch. THANKS!

05-04-2019, 02:21 AM	#3
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,158	Re: Distributor Point Lock Nut Try on a 8n,9n tractor site, that was the original use for that engine

05-06-2019, 04:39 PM	#10
cmbrucew Senior Member Join Date: Dec 2010 Location: North of sandy ago, CA. Posts: 2,064	Re: Distributor Point Lock Nut Try Echlin CS709 from Napa. Bruce __________________ Works good Lasts long time

05-10-2019, 10:24 AM	#12
gp1941 Junior Member Join Date: Sep 2015 Posts: 25	Re: Distributor Point Lock Nut Gentlemen, FYI, A fellow sent me a stationary point threaded #8-32tpi x 3/8" that appears to fit the breaker plate. The movable point arm does interchange with the Ford flat head. Apparently HOLLEY used an un-common fixed point. The complete internal assembly can be swapped with an Auto-Lite style and those parts are available. I will pursue the NAPA number. THANKS very much for all the help. I'll keep you posted.