Need a picture of a stock lug nut...

FWIW my spares all look exactly like the one in Mendel's picture - the reason I changed them to the Gorillas is that the Gorillas are blind (i.e. the thread does not go all the way through, but is deep enough for the nut to function correctly). The regular nuts are threaded right through allowing salt and nasty road-crud to get into the threads

 

My snow tires are on Corolla rims, and the plain lug nuts are what I'm using. Here my complete notes:

Corolla steel rim, part no: 42611-02471 (2003-2008 corolla or matrix, CE, LS, S)
steel rim lug nuts, part no: 90942-01007 (plain, open-ended, galvanized)

This is a 5 lug nut rim though, but maybe the lug nuts are similar. Your mention of heading to dealership makes a lot of sense. They should stock the best ones, and can advise.

 

Closed lug nuts like that keep the studs from rusting better. I make do with the open ended ones I have by putting a little dab of a wax/oil rust protectorant on the ends. Plus a 2" ABS end cap on the centre opening makes it look a bit more finished:

 

These are the wrong style of lugnuts for your steel wheels!

This style is what you need/want. Note that the base that makes contact with your wheels are cone shaped, not flat like the ones you have now.

These black acorn lugnuts would look good on your car:

http://a.co/6Df4r8z

 

The lug nuts for alloys have both the captured washer (for use with alloy rims) and the proper taper at the base, for use with steel rims. So they'll work fine with the temp spare, for example. Only thing: they look a little odd with steel rims, are quite tall, and the washers are doing nothing.

 

Thanks for the link, those look good. The color blends in, and the flared base prevents socket damage to the rim. I've noted the info.

What I'd really like is a similar nut, except closed end, for better rust prevention on the stud. Trouble is: they a

Still as far as I can see, the seat on the ones you link is the same as mine, the same cone shape. I got my snow tires and rims at a Toyota dealership, they did the first install, spec'd both the rims and the nuts.

The picture of my snow tire lug nut I posted before was a stock picture, the result of googling the part number. I took a look through my photos, dug up an actual pic of mine:



I kind of prefer the chrome alternative to your link:

Or the closed end version in black:

(though it's a bit tall, I guess to be one-size-fits-all)

 

My guess is that you are not going to find the shorter closed end style. They don't want you to tighten the lugnut on a long stud, which will stop when the stud hits the closed end inside, while leaving your wheel loose.

 

You don't need a picture, the fact that you posted in your first post, that the lugnuts don't seat properly into the depressions on the wheel surface, says that you:

Either need lugnuts with conical/acorn type base, or the Toyota type mag style lugnut with the captured washer AND a tapered base so it can properly seat into a steel wheel (usually the temporary spare tire).

The lugnuts you have are Toyota oem style for alloy wheels. The open ended lugnuts on the c with oem steel wheels will definitely have conical bases like the ones pictured from Amazon.

 

This might help:

WHEEL NUT type A for 2013 Toyota Prius C|90942-01007 : Toyota Online Parts | toyotaonlineparts.com | Toyota Parts Online

The "parts notes" in the link seem kinda hooped, not agreeing with the diagram.

The dealership parts department should be able to sort this out, btw.

 

And the type c might be what you guys want, a closed end lugnut with a conical base.

 

The part number for the nuts I'm using on my (Corolla) steel rims is 90942-01007, it IS the open-ended nut (type A) spec'd.