Lug Nuts - OEM Specs, Looking to replace the OEM set, but with WHAT?! Options

[KAOS]

Does anyone happen to know the thread/length/type of the OEM lug nuts?

I would say for the ST204, but feel free to post up other models as well. I would imaging they're all the same, but I've scavenged some 5th GEN lug nuts, but they're longer than the OEM ones that were on my car.

Near the beginning of my swap I snapped a lug/bolt clean off trying to undo the 30MM bolt from the axel bearings in the front... so there's a little back story for ya. LOL.

Thanks guys!

[ILoveMySilly97]

The thread is the same but the stock studs I believe is 30mm long.

[Langing]

The studs on my 94 Celica ST Coup (1.8L) are M12 x 1.5 and are 43 mm in length when measured from the inside of the head to the other end (i.e., not including the thickness of the bolt head).

In two sources I found that bolts with heads (that is basically what a stud is) are measured from the inside of the head to the other end (Sources: Haynes Repair Manual for my Celica, and a website called BoltDepot.com; Wikipedia is useless for this kind of information). Must exercise a little care in length measure because, for example, wood screws with tapered heads are measured to include the head, since it sinks into the wood up to that point. And I could use similar reasoning to mistakenly deduce that the 'usable' tread length when it comes to studs should be measured from the surface of the hub flange to its outer end.

I had to order a few from Rock Auto because I broke the threads on one when working on my Celica. When I looked in their catalog I found they had two different sizes specified for my 94 Celica. . . didn't say why. . . 43 mm and 36 mm. So, I purchased some of the 43 mm from their catalog, assuming they were what I had measured to be the length of the ones on my car. What I received are 44.70 mm (what Rock Auto calls 43 mm) from the outside of the head to the other end, 39 mm from inside of head to other end, and when inserted into the flange of the hub are definitely shorter than the other four studs.

Called Rock Auto and spoke to one of their people. The guy I spoke to (probably some chap in India?) claimed that ALL OF THEIR SUPPLIERS measured bolt lengths to include the head! Can this possibly be true? Does anyone know for certain? I didn't have time to call Rock Auto to get a second opinion.

All I can say with certainty is in the very first sentence. I know for certain that is true. Oh, and I know that on the head of the studs from Rock Auto is written 266 , a trademark, and the number 10.9, which is the bolt's strength, where 10.9 is the strongest metric number listed in my Haynes manual. That's good because the specified torque value for the lug nuts is 76 ft-lbs.