Spanner sizes Metric to Imperial...

Thought members might find this info useful so here you go... :wink:

* 1mm = just over 1/32 inch
* 2mm = just over 1/16 inch
* 3mm = almost 1/8 inch
* 4mm = 5/32 inch (= a bit over 1/8 inch)
* 5mm = just over 3/16 inch
* 6mm = almost 1/4 inch
* 7mm = almost 9/32 inch (= a bit over 1/4 inch)
* 8mm = 5/16 inch
* 9mm = almost 3/8 inch
* 10mm = just over 3/8 inch
* 11mm = almost 7/16 inch
* 12mm = almost 15/32 inch (= almost 1/2 inch)
* 13mm = just over 1/2 inch
* 14mm = almost 9/16 inch
* 15mm = almost 19/32 inch
* 16mm = 5/8 inch
* 17mm = almost 11/16 inch
* 18mm = just over 11/16 inch
* 19mm = 3/4 inch
* 20mm = 25/32 inch
* 21mm = just over 13/16 inch
* 22mm = almost 7/8 inch
* 23mm = 29/32 inch
* 24mm = just over 15/16 inch
* 25mm = almost 1 inch

* 1/16 inch = almost 2mm
* 1/8 inch = just barely over 3mm
* 1/4 inch = just barely over 6mm
* 3/8 inch = almost 10mm
* 1/2 inch = almost 13mm
* 5/8 inch = 16mm
* 3/4 inch = 19mm
* 7/8 inch = just barely over 22mm
* 1 inch = 25.4mm

Nice one greg thats getting printed off and stuck in my workshop manuals

i used to know them cause when i served my apprentice ship one guy worked in imperia land one was metric an i had to fetch the tools been the boy an if i got it wrong i got a doon

Thanks gregster for that,i always struggle with Metric and imperial,i will all so print that of my self :dance:

I always thought you was a nut and spanner kind of guy :rotfl:

Same here I used to know them all off by heart when a teenager as a machine fitter in a factory...but forgot them all now

For anyone needing a thread to spanner/socket conversion, I've prepared this pdf.
Please download and keep it for reference

http://www.keepandshare.com/doc/view.ph ... 35804&da=y

Cheers very useful

Great one Greg the list is now in the tool box

It's a very useful conversion chart.

My grandad was an engineer in the cotton mills in Bolton, so he had numerous tool boxes containing many weird and wonderful engineering tools and conversion charts. Can remember sitting on his worktable as a 6yr old with him explaining (or trying to) how various tools worked and the difference between imperial,whitworth and metric. happy days.

....but

I just take a spanner out try it, if it don't fit chuck it back and try another one...not exactly a precise way of engineering but the fronty isn't exactly a precise piece of engineering itself..well it could have been when it left Luton. but 13 years of spanner abuse has left it somewhat chucked together. (this system is the right system when working on a Fiat Punto's gearbox..as it appears that all punto gearboxes were made by an Italian on a friday just before Pastatime, so they used any old bolt / nut that could be found on the workshop floor / scrapbin)

Sorry Guys,
Try this http://docs.google.com/fileview?id=0B9w68v4n4wQfMzUxZTA2ZGYtZTcwOC00ZGExLTkwNjUtZDA5ZjM5MzhlYTZh&hl=en_GB
You will need a google account to view or download, but they are free and only take a min to sign up