[Fot] Wheel stud

[Mike Harmuth]

Thicker, stock length studs-
Here's some part numbers and a pic or two for stud upgrades I did to a few
Spitfires and GT6s. Not much longer, but stronger.

stock spitfire length 7/16 upgrade Dorman P/N 610-168

There is a slightly longer 7/16" stud Dorman # 610-156. The shoulder is the
same as stock, 3/8" , the  length is a little more, 1 23/32" but the
knurled part is slightly larger, .577" vs .572"

Actual measurements
Stock Spit 3/8"stud
Knurled part - 0.521 "
Shank - 0.496"
Length 1 5/8"

Dorman 610-168 7/16"-20
Knurled part - 0.512 "
Shank - 0.493"
Length 1 5/8"

Dorman 610-156 7/16" - 20
Knurled part - 0. 566"
Shank - 0.544"
Length 1 23/32"

drill for 610-156 - 35/64'
Also, you need to grind a flat spot on one end so it clears the hub radius

mike h
[image: Compare.JPG]
flat spot ground to clear hub radius
[image: Notch.JPG]


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On Wed, Oct 4, 2023 at 1:17 PM Mark Bradakis via Fot <fot at autox.team.net>
wrote:

> I seem to recall that an off the shelf Dorman stud for something like
> '75 - '77 Mercury Capri is almost an exact replacement for Spit/GT6
> wheel studs.  I may have the information out in the garage somewhere.  I
> recall I had to use the lathe to taper the boss on the end.  It has been
> quite some time, my memory isn't as good as it used to be.  I'll try to
> dig out the info in the next day or two.
>
> mjb.
>
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