63 Avanti Wheel Lug size/thread?

[63RedR3]

Need to replace the rusted lugs on car - is the size 12mm X 1.25?

Thanks

[1962larksedan]

quote:Originally posted by 63RedR3

Need to replace the rusted lugs on car - is the size 12mm X 1.25?

Thanks

Nothing metric on your car if original: you probably have 1/2" x 20 wheel lugs.

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[N8N]

left hand thread, on the left side of the car, if it's an older car (I assume we're talking about a '63 though so they'd all be RH by then.)

nate

--
55 Commander Starlight
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[52 Ragtop]

1963 Avanti's will all be a 1/2 x20 thread. Same as Ford or Chrysler

Jim

[bige]

Original wheels might not be compatible with a Ford lug. Ford is a 13/16" wrench size and the Stude is 3/4". I believe the angle of the cone mey be different between the two and not fit in the rim properly.

ErnieR

quote:Originally posted by 52 Ragtop

1963 Avanti's will all be a 1/2 x20 thread. Same as Ford or Chrysler

Jim

R2 R5388 @ Macungie 2006________________ 1988 "Beater" Avanti

[jlmccuan]

Are you asking about the lug stud or the lug nut? Same thread 1/2 x 20, but if you need the studs they are different front and rear. I can look it up but one is knurled where it seats the other is not. You can bore the smooth out slightly and fit the knurled. No one will know the difference unless they knock the studs out. I have the Dorman numbers here somewhere if you need them.

Jim
Often in error, never in doubt

____1966 Avanti II RQA 0088_______________1963 Avanti R2 63R3152____________Rabid Snail Racing

[63RedR3]

Just looking for the lug nut size - all still stock so will check with a 1/2 X 20 to be sure before order up a new set - thanks all.

Steve

[tbredehoft]

Yes, Ford nuts are 13/16 across the flats, while Studebaker are 3/4 across the flats. The threads in each of them are 1/2 20 SAE threads.

The taper on the Ford is 30 degrees, or 60 included, the Studebaker taper is 45 degrees or 90 included. If you use Studebaker nuts on a Ford wheel, It will contact at the outside edge only, on the points between the flats. If you put Ford nuts on a Studebaker wheel, it will hit in the center only, not making contact on the entire surface.

Don't mix them.

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Tom Bredehoft
'53 Commander Coupe (since 1959)
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