Size of fender bolt?

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Topic author
RGould1910
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First Name: Richard
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* REQUIRED* Type and Year of Model Ts owned: 1910 touring, 1912 roadster , 1927 roadster
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Size of fender bolt?

Post by RGould1910 » Wed Feb 23, 2022 10:58 am

Assembling a 12 roadster and need to know the size of the bolt that passes through the frame brackets (ears) at the rear and the holes in the body bracket. The holes are too large for a 3/8x24 bolt. Would like to know before I purchase them.

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RajoRacer
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Re: Size of fender bolt?

Post by RajoRacer » Wed Feb 23, 2022 11:32 am

I believe the body bracket bolts were 7/16" that held the body to the frame. Perhaps I'm not understanding your question - only the rear body brackets on the runabout have square holes for the fender bracket as they use a 3/8" carriage bolt inboard with the nuts outboard.


Topic author
RGould1910
Posts: 1128
Joined: Tue Jan 22, 2019 8:16 am
First Name: Richard
Last Name: Gould
* REQUIRED* Type and Year of Model Ts owned: 1910 touring, 1912 roadster , 1927 roadster
Location: Folsom, CA

Re: Size of fender bolt?

Post by RGould1910 » Wed Feb 23, 2022 12:18 pm

20220223_091122.jpg
20220223_091154.jpg

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RajoRacer
Posts: 5174
Joined: Sun Jan 06, 2019 12:18 pm
First Name: Steve
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Location: Longbranch, WA
Board Member Since: 2001

Re: Size of fender bolt?

Post by RajoRacer » Wed Feb 23, 2022 2:05 pm

Thanks for the photos Richard ! I wasn't aware of the "single" bolt holding the iron - earlier type than I'm familiar with.


Original Smith
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Re: Size of fender bolt?

Post by Original Smith » Thu Feb 24, 2022 11:23 am

Richard: As far as I know, that bolt is NOT available! I had to have one custom made for my '13. Yes, you can buy a bolt that will work, but it is not the same as the original Ford bolt. The original has an 11/16" hex head, and what is available today is 5/8" I maybe off on this, as I did this several years ago. You can't see this bolt when it is installed, but I like stuff to be correct. RV was going to get these made, but as we all know, that ain't going to happen now. Also, the heads have a slight convex top. He was also going to have the front and center bolts made too.


Topic author
RGould1910
Posts: 1128
Joined: Tue Jan 22, 2019 8:16 am
First Name: Richard
Last Name: Gould
* REQUIRED* Type and Year of Model Ts owned: 1910 touring, 1912 roadster , 1927 roadster
Location: Folsom, CA

Re: Size of fender bolt?

Post by RGould1910 » Thu Feb 24, 2022 5:07 pm

Wow that's good to know
I've used crankshaft to flywheel bolts in the past for the front and center body to frame brackets but like you I'd like to use replacements like the originals. I can make some fro 11/16" hex stock. Are the threads are coarse or fine?


Topic author
RGould1910
Posts: 1128
Joined: Tue Jan 22, 2019 8:16 am
First Name: Richard
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* REQUIRED* Type and Year of Model Ts owned: 1910 touring, 1912 roadster , 1927 roadster
Location: Folsom, CA

Re: Size of fender bolt?

Post by RGould1910 » Thu Feb 24, 2022 5:09 pm

Hey Steve, I lost your contact info. Could you call or text me if you have my number. I'll try to contact you thru Jay.


Original Smith
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Re: Size of fender bolt?

Post by Original Smith » Fri Feb 25, 2022 10:33 am

The bolts are are fine thread, with a cotter pin hole in the end.


Topic author
RGould1910
Posts: 1128
Joined: Tue Jan 22, 2019 8:16 am
First Name: Richard
Last Name: Gould
* REQUIRED* Type and Year of Model Ts owned: 1910 touring, 1912 roadster , 1927 roadster
Location: Folsom, CA

Re: Size of fender bolt?

Post by RGould1910 » Fri Feb 25, 2022 10:55 am

Thank you for the information. The bolts you describe are very similar to the magneto to fly wheel bolts which I have always used in the past. For this application I need 2 longer bolts for the rear fender brackets. I see those carried by a Mcmaster Carr have a 5/8 inch head. I'll probably go with those for now since I need to get the car ready for paint in a couple of weeks. When I have time I'll make up a set or 2 of the correct size and shape. If I could see a picture of one, I could recreate the domed head accurately and get the dimensions right.


Original Smith
Posts: 3699
Joined: Tue Jan 08, 2019 10:43 am
First Name: Larry
Last Name: Smith
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Location: Lomita, California
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Re: Size of fender bolt?

Post by Original Smith » Fri Feb 25, 2022 11:12 am

The appearance is the same as the front and center, only longer. I too have used flywheel bolts. There are no bolts anywhere with an 11/16 head anymore, any length!

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