Knuckle stud sizes?

Joined
Jul 27, 2017
Messages
59
Location
Oxford, MS
I purchased some used disc brake knuckles to replace the completely ruined ones I took off of my Venezuelan FJ40 (studs were all different sizes & some were welded in).
I then ordered some 12mm Knuckle studs from Marlin only to find they don't fit when I tried installing them today. The Marlin studs seem to be M12-1.5 on the knuckle end and M12-1.25 on the nut end. The studs that are in my knuckles now seem to be 7/16 - 20 on the nut end, and I have no idea what size it is on the knuckle end. My nut/bolt thread tool seems to have no match for em.

I can just keep the ones I have and get some new 7/16" - 20 nuts, but I'm keen to know what the size/thread of these studs really are and if replacements are available.
 
Joined
Dec 13, 2012
Messages
1,541
Location
KY
Are you talking about the wheel studs? Pictures would help. Also, year of the parts would help and which vehicle they came off.
 
Joined
Jul 27, 2017
Messages
59
Location
Oxford, MS
Hi @byron, sorry, no, speaking of the studs at the top and bottom of the knuckle (see photo attached, not mine).
I have no idea what year rig the knuckles came off of, but they are from the 'disc brake years'. There can't be too many different sizes of studs that were used over the years, but Marlin only sells M12 studs and I cant find any other sites that list the sizes of their studs.
Screen Shot 2021-09-26 at 8.19.07 PM.png
 

SlapSmak

SILVER Star
Joined
May 16, 2010
Messages
295
I would press the SAE studs out and install the correct metric stud back in. all knuckles from 40 to 80 use the same metric studs.
 
Joined
Apr 21, 2005
Messages
20,590
Wheel lugs were pressed in not the ones for the steering arms like Paul said. Since your using different knuckles think what year and model is the information needed to figure this out. Venezuelan cruisers were know to run Dana rear axles and you say the studs you took out were SAE I would take that out of the whole conversation. The current knuckles your using is all that matters.
 

Users who are viewing this thread

Top Bottom