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Bolt size for flower pot hubs

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=208804
Printed Date: 28 Dec 2025 at 1:50am
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Topic: Bolt size for flower pot hubs
Posted By: Joe(OH)
Subject: Bolt size for flower pot hubs
Date Posted: 05 Nov 2025 at 12:31pm
Anyone know what size bolt to put flower pot dual hubs on?  I plan on installing a set this weekend and was trying to be lazy about determining bolt size.  Thanks!  

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Life is simpler when you plow around the stump.



Replies:
Posted By: Jordan(OH)
Date Posted: 05 Nov 2025 at 9:39pm
Couple self tappers oughta do it.


Posted By: IBWD MIke
Date Posted: 06 Nov 2025 at 5:47am
Joe, I don't know specifically but a lot of dual hubs use 5/8" bolts/studs. Fine thread most times, 18 pitch I believe. The ones that mount the hub to the center could be 3/4" maybe?


Posted By: Calvin Schmidt
Date Posted: 12 Nov 2025 at 11:13am
It's been a lot of years since I put mine on my D21. Likely 3/4" to mount the hub to the center. There are two different sizes of studs to mount the dual to the hub. 

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Nothing is impossible if it is properly financed


Posted By: plummerscarin
Date Posted: 12 Nov 2025 at 12:39pm
Guess I will need to take a closer as I plan to move them to another tractor. I did see they are carriage bolts and appear to be 5/8”. As for length, will get back to you on that


Posted By: plummerscarin
Date Posted: 14 Nov 2025 at 6:22pm
Ok, I know it's late to the party but here it is:
On our tractor the flower pots are held on with ¾"×3½" grade 5 carriage bolts



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