Quote:
Originally Posted by Thor
Guys,
I am cleaning up a '52 F1 front suspension that I have and I need to chase the threads on a couple of the leaf spring u-bolts. I measured the u-bolts with a caliper and they appear to be a nominal 9/16" in diameter. The threads are fine threads which leads me to surmise they are 9/16-18 UNF.
I checked some sites like Mac's and Dennis Carpenter to see if the thread information was available but I was unsuccessful.
Before I commit to buying a die to chase the threads I thought I would confirm this with the experts here. Have I surmised correctly? 
Thanks! |
The thread size is indeed 9/16-18.
48-52 uses 01Y-5455-C for the "U" bolts. The nuts are 33848-S7
The lock washers are 34850-S
A regular cutting die will definitely "chase" threads.... it will also
remove metal, which you really don't want to do. A thread chaser would be better.
I used McMaster-Carr for the nuts, which meet the SAE standards for
nuts used in this application....
https://www.mcmaster.com/90565A333/