Thread: 11mm nut no such thing

At the end of the day a Tradesman with a decent set of spanners will have most if not all to cover Imperial and Metric Sizes for the work that they do.
The backyarder usually uses what ever they can find that will or almost will fit properly.
Shifters are multi size but you cant beat the correct spanner or socket for the job,I suppose thankyou to who ever thought of bandaids.

Ah yes!! The good old shifter, described by a mate of mine as a portable lathe!

Funny thing about AF. I heard an argument once where the protagonists saw AF as American Fine ,... or Across Flats.

Originally Posted by Pete F

Ha Ha, oh gawd! It really is out of control isn't it.

not really, whitworth is a much older standard then unified or metric...Back when wrought iron was king things were different...

This is a well indexed source of thread standards information you might want to bookmark.

ISO Metric Fine Thread DIN 13

Nice site! Seems the M11 x 1.0 still doesn't get a mention anywhere that I could see.

... oh no, it says that camera mounts are actually UNC not whitworth so that means we still don't have a winner

What's it say right between 10 and 12 on that link?

Originally Posted by Pete F

Nice site! Seems the M11 x 1.0 still doesn't get a mention anywhere that I could see.
.

about half way down the chart referenced.
ISO Metric Fine Thread DIN 13 11,00 x 1,00 taping drill 10mm

Edit: Big Shed types quicker tham me.

Don't get too comfortable there. There is even variation in Whitworth. Not in the actual threads but in the way the head size is measured. There is Whitworth and British Standard Whitworth. I can't remember how it goes now (its 20 years since I worked on anything with whitworth) but for example a spanner marked 1/2" Whit is not the same size as one marked 1/2"BSW.

bollie7

BSW has the head one size smaller than whitworth.

e.g. a 5/16 whitworth bolt has the same head size as a 3/8 BSW bolt.

Yes thanks, I was in a hurry and didn't see it there. So many zeros and ones

Originally Posted by blackfrancis

BSW has the head one size smaller than whitworth.

e.g. a 5/16 whitworth bolt has the same head size as a 3/8 BSW bolt.

Thanks, I knew it was something like that but after 20 years or so I had forgotten.
bollie7

The other thing that may bite you with Whitworth threads is that pre-war bolt & nut sizes are larger than post-war. During the war the bolt head and nut sizes were reduced to save materials.

I found this out when I started restoring pre-war british engines.

Originally Posted by Gavin Newman

The other thing that may bite you with Whitworth threads is that pre-war bolt & nut sizes are larger than post-war. During the war the bolt head and nut sizes were reduced to save materials.

I found this out when I started restoring pre-war british engines.

Was in at Bolts and Industrial in Brisbane one day when a fellow came in with a bolt and a stripped nut. They came from a Beaufors Gun that was being restored. Of course everything had to be absolutely genuine. The thread was worked out and a nut found but the nut was not as big as the original.

Maybe the above story explains that.

Originally Posted by .RC.

nah, you just use a shifter

Naa, I don't need no stinkin shifter, I've got vice grips.

And for stubborn bolts, cold chisel and hammer.

Originally Posted by damian

Naa, I don't need no stinkin shifter, I've got vice grips.

And for stubborn bolts, cold chisel and hammer.

Oxy

Oxy is stage 2.

Why break out the gas axe if you can bash something with a hammer ? Lighter to carry, quicker to deploy, and MUCH more satisfying

You can tell I'm a mechanic by trade can't you ?

Edit: Can't believe this is now 6 pages.