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T-Series & Prewar Forum

TF and TD Steering Wheel nut type/size

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jdiehl Avatar
jdiehl Gold Member Jack Diehl
ENCINITAS, CA, USA   USA
1954 MG TF
I need to repair the threads on the steering wheel/column. Need to know the nut size and type so I can use the right die…
Thanks
Jack

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vabre Avatar
vabre John Walton
Lugarno, New South Wales, Australia   AUS
1950 MG TD
1970 MG MGB MkII
My thread on 1950 TD is 3/4" UNF. But check your thread first in case it has been changed.

John

buscar Avatar
buscar Silver Member Carlo Busato
Canberra, ACT, Australia   AUS
1953 MG TD
Late model TD's went to a BSF thread I believe, so be careful !

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jdiehl Avatar
jdiehl Gold Member Jack Diehl
ENCINITAS, CA, USA   USA
1954 MG TF
That’s what I thought might be the case. I assume all TF’s would be BSF as well... I will still be cautious.
Thanks for the information.

Jack

TD4834 Avatar
TD4834 Bill Chasser
Sacramento, CA, USA   USA
1950 MG TD
1951 MG TD MkII
UNF for early TDs? The thought the only UNF threads AAppeared on differentials and wheel lugs starting with late TDs



Bill Chasser
TD-4834
TD/c-8151
TD/c-16920
TD-19408
TD-24060

vabre Avatar
vabre John Walton
Lugarno, New South Wales, Australia   AUS
1950 MG TD
1970 MG MGB MkII
Well that is the thread on my original column. Don't forget the TD's were imported into Australia in a knocked down condition (ckd) so who knows what they used in assembly, but I assure you it is UNF.
John...Sydney

vabre Avatar
vabre John Walton
Lugarno, New South Wales, Australia   AUS
1950 MG TD
1970 MG MGB MkII
Jack,
Use a thread gauge to check.
A 3/4" UNF has a 60deg. thread angle with 16 threads to the inch whilst a 3/4" BSF has a 55 deg thread angle with 12 threads to the inch.
Hope this helps.
John...Sydney

jdiehl Avatar
jdiehl Gold Member Jack Diehl
ENCINITAS, CA, USA   USA
1954 MG TF
Thank you for this important information. This forum is incredibly active and appreciated.

buscar Avatar
buscar Silver Member Carlo Busato
Canberra, ACT, Australia   AUS
1953 MG TD
Hi Jack, in my previous post I think I got my facts back to front ! I recently had to order a new steering wheel nut since the original had been misplaced during my restoration. The first one I received was a 3/4 BSF which didn't fit, so after talking to the supplier and realising that I had a late model('53) TD he supplied the correct UNF nut. I'm not sure at what point during the TD life cycle it was changed, but it was most probably when they changed the diff and wheel nuts to UNF. Hope this helps.

TD4834 Avatar
TD4834 Bill Chasser
Sacramento, CA, USA   USA
1950 MG TD
1951 MG TD MkII
John I’m not doubting your comment. I simply wasn’t aware of a UNF thread ever being used at the steering wheel. I’ll have to check all my cars and see if there is a difference



Bill Chasser
TD-4834
TD/c-8151
TD/c-16920
TD-19408
TD-24060

vabre Avatar
vabre John Walton
Lugarno, New South Wales, Australia   AUS
1950 MG TD
1970 MG MGB MkII
That's Ok Bill. No problems.
Regards
John

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