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PostPosted: Tue May 14, 2019 9:28 pm 
Retro Guru

Joined: Thu Aug 20, 2015 9:01 am
Posts: 318
My Gillott has a Gnutti H/S so around 1940s-1950s.

The top nut on the H/S is a bit loose and a 32mm H/S Spanner does not fit the nut correctly.

Measuring the top nut with an electronic vernier it measures 1.25" or 31.9mm.

I've looked on nut/bolt conversion sites around the sizing to try and figure out an imperial size Spanner but can't make any sense of conversions tables.

Please can someone tell me what size imperial Spanner will do the job.


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PostPosted: Tue May 14, 2019 9:40 pm 
Retro Guru
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Joined: Sun Feb 08, 2015 8:51 am
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Location: Macclesfield, Cheshire
This one seems pretty clear, hope it helps:

http://infinityline.net/conversion.htm


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PostPosted: Wed May 15, 2019 12:17 am 
Devout Dirtbag

Joined: Sat Jul 09, 2016 4:07 pm
Posts: 101
Location: Rutherglen
Is this one of those trick questions? i'm i going to get a buzz when i say an answer and get it wrong?

1.25" is decimal for 1 1/4" (inch and a quarter)

Therefore id say spanner size is 1 1/4" AF (inch and a quarter across the flats)?

Try gluing a 0.1mm shim on the jaw of the 32mm if you haven't got a imperial spanner to fit. Might not look pretty but as my wwII 8th army veteran grandfather used to say "it'll get you out the desert"


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PostPosted: Wed May 15, 2019 2:33 am 
r.B.o.T.M. & P.o.T.M. Winner
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PostPosted: Wed May 15, 2019 7:58 am 
Retro Guru
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Joined: Thu May 17, 2012 11:04 am
Posts: 624
Location: manchester
dan73uk wrote:
My Gillott has a Gnutti H/S so around 1940s-1950s.

The top nut on the H/S is a bit loose and a 32mm H/S Spanner does not fit the nut correctly.

Measuring the top nut with an electronic vernier it measures 1.25" or 31.9mm.

I've looked on nut/bolt conversion sites around the sizing to try and figure out an imperial size Spanner but can't make any sense of conversions tables.

Please can someone tell me what size imperial Spanner will do the job.


if the nut measures 31.9 then the spanner is sloppy made.


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