What does this mean- Ø

[Homervanderjazz]

The full sentence is - Please ensure you use an Ø6mm standard woodscrew at least 45mm long.

I get everything bar what this symbol Ø means, can someone please advise? Thanks

 

[JohnD]

diameter

is it an american document you are reading?

 

[Homervanderjazz]

diameter

is it an american document you are reading?

No, it is on screwfix site, in relation to Fischer duo wall plug, in Q&A section, where someone has asked what screw to use.

 

[Burnerman]

Anyone remember BS308? The British Technical Drawing standard since 1930, I believe but I've no idea what it is now.
Theta was used to designate diameter, and also to distinguish between 0 and O.
John

 

[ETAF]

its use in britain in the 1970's while i was a Ministry of Defence Apprentice for Electronic Engineering, Part of the 1st year school was spent training in a technical drawing section, drawing circuits / circuit boards etc , and that symbol was used for diameter, often resistors , circuit board holes etc . Its the Greek letter Phi in fact.
We also spent a few weeks programming on the central computer using teletype , and that was also used as a zero
in fact I use that as a zero to this day.

 

[Burnerman]

Phi, lower case! I just couldn't remember it this morning.
Thanks for the correction!
John

 

[just pumps]

I still use it rather than dia or diameter.

 

[freddiemercurystwin]

I use it all the time on my drawings.

 

[conny]

Constantly use it for diameter on notes or instructions for someone else.
Maybe I'm wrong in presuming everyone knows what it stands for.

 

[freddiemercurystwin]

It's completely standard to use it in the building industry.

 

[zuber ali]

Diameter

 

[opps]

its use in britain in the 1970's while i was a Ministry of Defence Apprentice for Electronic Engineering, Part of the 1st year school was spent training in a technical drawing section, drawing circuits / circuit boards etc , and that symbol was used for diameter, often resistors , circuit board holes etc . Its the Greek letter Phi in fact.
We also spent a few weeks programming on the central computer using teletype , and that was also used as a zero
in fact I use that as a zero to this day.

When I saw the word "phi" I was sitting here thinking, "shouldn't that be pi".

I was completely unaware that phi and pi are both letters of the Greek alphabet. Phi often used as the Golden Ratio (1.61) whereas Pi is 3.14 (the ratio of the circumference of a circle to its diameter).

I wonder when phi first became synonymous with diameters.

Edit- I have just noticed that the OP thanked @ETAF but the thanks notification lists him as being "deleted member". Very odd.

 

[Deleted member 174758]

.

 

[Deleted member 174758]

Edit- I have just noticed that the OP thanked @ETAF but the thanks notification lists him as being "deleted member". Very odd.

That's odd - shows as last seen at 1.10pm TODAY

Actually both outside diameter and inside diameter, depending on the position relative to the numbers - a circular blade described as "Ø305 x 30Ø 72Z ATB" is a 305mm diameter x 30mm bore 72-tooth (Zahn) TCT saw blade with alternative top bevel teeth. Very common in German tooling catalogues. I'm beginning to think I must get out more...

 

[opps]

That's odd - shows as last seen at 1.10pm TODAY

Actually both outside diameter and inside diameter, depending on the position relative to the numbers - a circular blade described as "Ø305 x 30Ø 72Z ATB" is a 305mm diameter x 30mm bore 72-tooth (Zahn) TCT saw blade with alternative top bevel teeth. Very common in German tooling catalogues. I'm beginning to think I must get out more...

When I click on his profile I see this

Homervanderjazz​

Joined 7 Feb 2012
Last seen Monday at 11:54 PM

Monday at 11:54 PM
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