Thread type for stud 630 three point

jkmdg84

Member
I am working on getting my three point installed on my 630. Went to my parts book yesterday to figure out all what bolts I will need. The one I have a question on is the stud that screws into the drawbar frame (#12 in the diagram). The part number is M3210T and four are used, and they are $31 per stud from Deere. Looking on jdparts it looks like each side of the stud is threaded differently, the outer end is coarse thread, but the side that screws into the frame is NS thread.

I would really like not have to spend $120+ on four little studs. Does anyone know by chance what exactly is the threads per inch for that NS side? I have standard and metric coarse/fine thread dies, but I fear that neither coarse or fine is correct.

cvphoto20636.jpg
 
My GUESS would be that the "NS" ("special") end is 5/8" NC but slightly oversized for a tight fit in the casting, as is common on studs.

Does a standard 5/8" NC tap fit the threads in the casting?
 
Being 5/8", it is highly unlikely that ARP would have anything. 1/2" and down, ARP keeps most anything you can dream of. Once you go above 1/2", their selection starts getting thin.
 
Go to a heavy truck parts store and get 5/8" studs that hold wheel wedges on dayton wheels.
 

Spec's for M3210T is shown in photo below. Those studs were utilized on over 28 different JD machines including securing rear axle housings on a 1010 & securing 3010 trans case to clutch housing at one location
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. Go to Google and search for UNS thread sizes you will find a chart for UNS threads, unified special thread chart. You will find 5/8 14 and 5/8 27 threads listed. Take a wax candle or soft piece of wood and trim it and screw it in the hole. Screw it out and take a screw gouge or caliper and measure it. After you know what pitch thread you have go from there.
 
(quoted from post at 16:04:18 04/23/19) . Go to Google and search for UNS thread sizes you will find a chart for UNS threads, unified special thread chart. You will find 5/8 14 and 5/8 27 threads listed. Take a wax candle or soft piece of wood and trim it and screw it in the hole. Screw it out and take a screw gouge or caliper and measure it. After you know what pitch thread you have go from there.

Note that the DEERE "spec" on the threads is "NS", and NOT "UNS".
 
That is common to leave the U off. Means the same. U is for Unified and originated during WWII (I believe) so that US and British threads would be interchangeable.
 

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