More acceptable to say "3mm" or "3 mm"?

OdiN

Banned
Mar 1, 2000
16,430
3
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If I'm talking cars/woodworking/construction - it's always going to be 3mm.

3mm does not specify quantity though.

If I wanted a quantity I would say I wanted 3 3mm bolts.
 

Tiamat

Lifer
Nov 25, 2003
14,068
5
71
Originally posted by: Howard
Do you use a space between the quantity and the unit?

yes, the space is the accepted way (in scientific or engineering publications).
 

bobross419

Golden Member
Oct 25, 2007
1,981
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I usually put no space for most Metric. If I'm using imperial measurements I usually put a space.