Body to Frame Bolts

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Original Smith
Posts: 3699
Joined: Tue Jan 08, 2019 10:43 am
First Name: Larry
Last Name: Smith
* REQUIRED* Type and Year of Model Ts owned: 13 Touring, 13 Roadster, 17 Coupelet, 25 Roadster P/U
Location: Lomita, California
MTFCA Life Member: YES

Body to Frame Bolts

Post by Original Smith » Fri Oct 30, 2020 1:38 pm

Almost from my start, 60 years ago I've been interested in the correct bolts used on the Model T's I've owned. I assembled a 1925 pickup about ten years ago from scratch, and I guess 98% of the bolts I used for that car are original factory bolts. Once you learn them, they aren't hard to spot. Lately, I've been working on some earlier cars, 13-15 and have noticed they are 7/16-20 with an 11/16 head on both the bolt and the castle nut. Those sizes are not standard any more, and I'm wondering how many years they used them until they went to the standard sizes with a 5/8 head. I've checked Bruce's master parts list, and there is little information. Randall Anderson is the only person I know of that is knowledgeable on the subject. A few years ago, I realized I had installed an incorrect rear body bolt on my '13 touring way back when I was a teenager with a 5/8 head. I had Don Skille make me a correct one from a larger grade 5 bolt. I'm sure most of you probably think I'm crazy being this way, but I can't help it!
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GSchreppler
Posts: 17
Joined: Mon Mar 25, 2019 9:37 am
First Name: George
Last Name: Schreppler
* REQUIRED* Type and Year of Model Ts owned: 1911 torpedo 1912 roadster
Location: Delaware

Re: Body to Frame Bolts

Post by GSchreppler » Fri Oct 30, 2020 2:10 pm

you can buy the castle nuts 11/16 but you have to make the thick head bolts Henry used 11/16 thru out production by my research
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Stephen_heatherly
Posts: 386
Joined: Wed Jan 09, 2019 6:03 pm
First Name: Stephen
Last Name: Heatherly
* REQUIRED* Type and Year of Model Ts owned: 26 coupe and 23 Runabout
Location: St. Louis MO

Re: Body to Frame Bolts

Post by Stephen_heatherly » Fri Oct 30, 2020 3:17 pm

My 23 has 7/16 20 bolts with 11/16 hex nuts.

Stephen
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