2nd Gen Non-Engine/Transmission 12 Point bolt size

[DNewell]

I'm going to try here before I contact the stealers and get their input. I trust you guys more than I trust them.

Anyone know what the exact size of the 12 point bolt that holds the front rotor to the hub? I've got some new EGR brakes coming and I need to get this socket prior to disassembly. Thanks!!!

 

[Nate]

What bolt that holds the rotor to the hub?? On my truck, the rotor is held on by the wheel studs.

 

[DieselTweaker]

If your looking to remove the hub you will need a 12mm 12point

 

[Nate]

Which bolt would that be? The only 12 bolt I can think of would be the 4 bolts holding the hub to the knuckle, and those I believe are 9/16"

 

[DNewell]

I was under the impression that the rotor was held on to the hub assembly by the four 12point bolts. I must have gotten some bum information from someone along the line. They turned out to be 14mm bolts.

 

[Nate]

14mm = 9/16"... or it is 15mm? I can't remember for some reason :-laf

 

[DNewell]

Nate, pretty damn close!!! I found this website:

http://www.sciencemadesimple.com/length_conversion.php

and it indicates that 14mm = . 55 inches. With 9/16 = . 56inches, you were within a hundredth. I bought various sizes at Home depot today, and when I went out to the truck, sure enough, the 14mm slid right on.

 

[Nate]

Yeah it's kinda like 1/2" = 13mm... though the 13mm is just a hair larger... enough that once in a while a 1/2" wrench won't fit, but the 13mm will. 3/4" = 19mm, 7/16" = 10mm... Alot of the metric sizes will cross over. I hate the bolts that aren't standard or metric is seems. . Then it's vice grip

 

[DNewell]

yeah, it seems like our trucks use half SAE and the other half are metric... Frustrates me to no end when working on it. I'm not where I can look at my truck, but do you know what kind of bolt holds on the caliper to the knuckle?

 

[Nate]

It's a 3/8" Hex on my truck.