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General Chat with an emphasis on BMC Minis & Other iconic cars of the 1960's.
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360gts
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Post by 360gts »

Anyone recognize this thread....it isn't NC or NF.
Not 10/24 or 10/32.
Maybe 1/8 BSP!
Definitely not metric.
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Last edited by 360gts on Fri Dec 27, 2024 10:04 pm, edited 3 times in total.
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Polarsilver
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Re: Thread type

Post by Polarsilver »

would help to know the TPI .. maybe Whitworth but not too sure :oops:
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timmy201
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Re: Thread type

Post by timmy201 »

BA thread?
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360gts
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Re: Thread type

Post by 360gts »

timmy201 wrote: ↑Sat Dec 28, 2024 1:13 amBA thread?
These are the bolts on my vintage Paddy Hopkirk straps...would they be BA thread???
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Spider
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Re: Thread type

Post by Spider »

Bit of a challenge there without knowing the exact diameters (Major and Minor) but my best guess is 5/32" WW.
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timmy201
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Re: Thread type

Post by timmy201 »

360gts wrote: ↑Sat Dec 28, 2024 3:56 am
timmy201 wrote: ↑Sat Dec 28, 2024 1:13 amBA thread?
These are the bolts on my vintage Paddy Hopkirk straps...would they be BA thread???
Anything is possible at that time. They had a couple of BA threads on the mini so it’s possible the accessories had them too

The Mk1 horn button retaining screw is BA and some on the door handle. You could try and see if they are compatible
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360gts
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Re: Thread type

Post by 360gts »

timmy201 wrote: ↑Sat Dec 28, 2024 5:37 am
360gts wrote: ↑Sat Dec 28, 2024 3:56 am
timmy201 wrote: ↑Sat Dec 28, 2024 1:13 amBA thread?
These are the bolts on my vintage Paddy Hopkirk straps...would they be BA thread???
Anything is possible at that time. They had a couple of BA threads on the mini so it’s possible the accessories had them too

The Mk1 horn button retaining screw is BA and some on the door handle. You could try and see if they are compatible
Good tip Timmy
Tried the bolt in a couple of horn buttons...BINGO...it matches perfectly.
So, next question....what size is the bolt? 0BA 1BA 2BA???
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Peter Laidler
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Re: Thread type

Post by Peter Laidler »

At a guess, without my zeuss book handy, being an frequent BA user and the application, I'd say 2BA
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hanlminiman
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Re: Thread type

Post by hanlminiman »

Happy seasonal greetings Peter. I agree that it is probably 2 BA which I think is the same as the bulkhead fixings for the speedo cowl. Best wishes for good health in 2025. Catch up soon at Gaydon maybe?
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timmy201
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Re: Thread type

Post by timmy201 »

360gts wrote: ↑Sat Dec 28, 2024 4:36 pm
timmy201 wrote: ↑Sat Dec 28, 2024 5:37 am
360gts wrote: ↑Sat Dec 28, 2024 3:56 am

These are the bolts on my vintage Paddy Hopkirk straps...would they be BA thread???
Anything is possible at that time. They had a couple of BA threads on the mini so it’s possible the accessories had them too

The Mk1 horn button retaining screw is BA and some on the door handle. You could try and see if they are compatible
Good tip Timmy
Tried the bolt in a couple of horn buttons...BINGO...it matches perfectly.
So, next question....what size is the bolt? 0BA 1BA 2BA???
They are 2BA
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cpr1
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Re: Thread type

Post by cpr1 »

could be 3/16 BSF ?
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