Need a bolt head measurement, please. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**HO455** · 07-23-2022, 09:47 PM

If someone has some time to measure one, I'm looking for the diameter of the head of one of the factory wood floor bolts. It is one of the 5 carriage head bolts circled in the photo.
The 2nd photo is one I removed when I replaced my floor. I didn't keep it unfortunately.
Thanks in advance.

**LockDoc** · 07-23-2022, 10:09 PM

Quote:

Originally Posted by HO455

If someone has some time to measure one, I'm looking for the diameter of the head of one of the factory wood floor bolts. It is one of the 5 carriage head bolts circled in the photo.
The 2nd photo is one I removed when I replaced my floor. I didn't keep it unfortunately.
Thanks in advance.

I should have a decent used one. I will check in the morning. They have a special name but for the life of me I can't think what it is.....

LockDoc

**Getter-Done** · 07-23-2022, 10:18 PM

Are those called Elevator bolts?

**kwmech** · 07-24-2022, 12:45 AM

I believe so.

https://www.fastenal.com/product/Fas...egoryId=600009

and

https://www.fastenal.com/product/Fas...egoryId=600009

BAD1916 · 07-25-2022, 09:36 AM

I’m not sure how accurate my measurement is because I’m checking it in the truck but I got about 13/16. With it being recessed I can’t really get a good reading but the hole is measuring just over 7/8.

**LockDoc** · 07-25-2022, 11:46 AM

-
I had to regroup and delete my first post. I didn't read your text close enough and just looked at the picture. I thought the picture you posted was a flat head bolt but I see you said it was a carriage head bolt.

The original carriage head style bolt I have measures 7/8" head dia. x 1 1/8th inch long, (measured from under the head) 3/8 bolt size. The head is flatter than the carriage bolts of today and is perfectly smooth.

I can send you the one I have if that will help....

LockDoc
.

**HO455** · 07-25-2022, 05:21 PM

Thanks guys. They are a carriage head style with an extra large head.

I found a old box full of what looks to be the same bolt. I didnt have an original to measure to be to confirm they're the same.

I should have posted this picture. The #1 bolt is what I was looking for.

I used a non-factory style replacement when I replaced my floor. I was unable to locate factory style replacements. Well the truth is I could have gotten them if I wanted to buy 5000 of them and wait like 10 weeks for delivery. Now if I could have gotten 999 patient Burban owners to step up I might have gone for it.

Thanks for the offer Doc but I shouldn't need anything more than the measurements.

07-23-2022, 10:18 PM	#3
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 7,724	Re: Need a bolt head measurement, please. Are those called Elevator bolts? __________________ ________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build

07-24-2022, 12:45 AM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,389	Re: Need a bolt head measurement, please. I believe so. https://www.fastenal.com/product/Fas...egoryId=600009 and https://www.fastenal.com/product/Fas...egoryId=600009

07-25-2022, 09:36 AM	#5
BAD1916 Registered User Join Date: Oct 2012 Location: VENTURA COUNTY CALIFORNIA Posts: 268	Re: Need a bolt head measurement, please. I’m not sure how accurate my measurement is because I’m checking it in the truck but I got about 13/16. With it being recessed I can’t really get a good reading but the hole is measuring just over 7/8.

07-25-2022, 11:46 AM	#6
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,330	Re: Need a bolt head measurement, please. - I had to regroup and delete my first post. I didn't read your text close enough and just looked at the picture. I thought the picture you posted was a flat head bolt but I see you said it was a carriage head bolt. The original carriage head style bolt I have measures 7/8" head dia. x 1 1/8th inch long, (measured from under the head) 3/8 bolt size. The head is flatter than the carriage bolts of today and is perfectly smooth. I can send you the one I have if that will help.... LockDoc . __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

07-25-2022, 05:21 PM	#7
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 10,804	Re: Need a bolt head measurement, please. Thanks guys. They are a carriage head style with an extra large head. I found a old box full of what looks to be the same bolt. I didnt have an original to measure to be to confirm they're the same. I should have posted this picture. The #1 bolt is what I was looking for. I used a non-factory style replacement when I replaced my floor. I was unable to locate factory style replacements. Well the truth is I could have gotten them if I wanted to buy 5000 of them and wait like 10 weeks for delivery. Now if I could have gotten 999 patient Burban owners to step up I might have gone for it. Thanks for the offer Doc but I shouldn't need anything more than the measurements. Attached Images __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

07-23-2022, 09:47 PM	#1
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 10,804	Need a bolt head measurement, please. If someone has some time to measure one, I'm looking for the diameter of the head of one of the factory wood floor bolts. It is one of the 5 carriage head bolts circled in the photo. The 2nd photo is one I removed when I replaced my floor. I didn't keep it unfortunately. Thanks in advance. Attached Images __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377



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