Ball joint nut size/source

[Alec]

I have a damaged LCA ball joint slotted nut. My son tried to thread it onto a bolt that was a diffferent pitch. Napa was stumped, and a local fastener supplier that napa sent me too also failed. I thought it would be easy to find, mustangs are everywhere. What is the size (and or p/n), and where should I be able to find it? thanks!

[Jeff Kleiner]

5/8-18 castle nut. Should be available at any well stocked hardware or parts store.

Jeff

[Mastertech5]

I have an extra set of lower ball joint nuts and I just measured the thread per inch. I believe they are 5/8-18 castle nuts. Mine is a 33 Hot Rod but I think they are the same.

[CraigS]

If you can't find the slotted nut just get two standard nuts and use one for a jam nut to lock the first nut in position.

[Jhinkemeyer]

If you can't find the specific one for the mustang (https://www.cjponyparts.com/ball-joint-castle-nut-zinc-coated-with-stainless-cotter-pin-pair-mustang-1979-1993/p/HW4639/?year=1983&gclid=Cj0KCQjw1vSZBhDuARIsAKZlijQ8iL08njDMj9fP4P09-azhu7cwrixQseCR2YSNNuOAcPK_l6p1EEUaAnJdEALw_wcB) locally Dorman makes an assortment (13559 or 13560) both have 5/8-18 you need, any parts store should have.

https://www.autozone.com/nuts-bolts-and-washers/slotted-hex-nut/p/dorman-help-slotted-hex-nut-assortment/426036_0_0

https://shop.advanceautoparts.com/p/dorman-help-castellated-hex-nuts-assortment-13559/9110142-P?searchTerm=13559

etc.

[Chopper]

You can also get them at McMaster, although it certainly won't be the most economical as they will charge shipping and also sell them in a quantity of 10. However, if you happen to be putting a McMaster cart together otherwise, maybe an option:


https://www.mcmaster.com/97190A170/ (https://www.mcmaster.com/97190A170/)