Lug nut size

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Apr 17, 2012 | 01:01 AM

vetteguy22

Thread Starter

Burning Brakes

Joined: Oct 2010

Posts: 1,160

Likes: 23

From: Prescott AZ

Lug nut size

Hi guys,
I need to pick up some open end lug nuts for my 1993 ZR1 so that I can tighten down the new Wilwood rotors to check alignment of the new calipers. Can anyone help me out with the lug nut size and thread?
Thanks,
Rob

Apr 17, 2012 | 02:15 AM

rodj

Le Mans Master

Joined: Aug 2000

Posts: 8,838

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From: Australia

IIRC
M12 x 1.5mm

Apr 17, 2012 | 02:22 AM

Hot Rod Roy

Safety Car

Joined: Sep 2004

Posts: 3,953

Likes: 550

From: Mission Viejo CA

Did you consider using larger nuts as spacers under your standard lug nuts? I think (dare I say the word) F*rd lug nuts will slide right over your studs.

Apr 17, 2012 | 09:26 AM

vetteguy22

Thread Starter

Burning Brakes

Joined: Oct 2010

Posts: 1,160

Likes: 23

From: Prescott AZ

Thanks guys for the info. Not a bad idea with the spacers but this is a ground up build, so I don't have any lug nuts at all now.

Apr 17, 2012 | 10:34 AM

c4cruiser

Team Owner

Joined: Dec 1999

Posts: 34,873

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From: Lacey WA RVN 68-69

NCM Sinkhole Donor

Quote:

Originally Posted by rodj

IIRC
M12 x 1.5mm

Lugnuts also need a 60 degree taper for mounting the wheels.

This size is pretty common across GM passenger cars so any parts store will have them.

But for doing what you need to do, any hex nut with that thread size will work. As mentioned, use some flat washers too. You should only need 3 nuts to get the rotors tight against the hub mounting flange for checking clearances.

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