First post in this stack but curious on if there is a 'right' answer (within Australian or ISO standard) for how to quantify numerous holes of same size/properties on a drawing. In the past I've seen (assuming 4-holes of 8mm diameter)

  • Ø8 4 Places
  • Ø8 4-OFF
  • Ø8 x4
  • Ø8 (4)
  • 4 x Ø8

Looking at AS 1100.101 (Technical Drawings) it seems to show the last option; enter image description here

However, looking AS 1100.201 (Mechanical Engineering) I'm unable to find industry specific confirmation. (at a glance)

What I really want to know, is what do most of you consider 'best practice'. Or what is commonly used in the industry seeing as the standards have not been updated since 1992. If from country other than Australia, please note where you're 'best practice' is considered.

  • $\begingroup$ All the odd ones you mentioned seem fine. Even ones seem to be a bit more ambiguous. $\endgroup$
    – Abel
    Sep 21 at 1:27
  • $\begingroup$ Have you checked any of the Engineering Drawing books? many exist and all cover this type of information... $\endgroup$
    – Solar Mike
    Sep 21 at 5:52
  • $\begingroup$ 4x is the right way to do it in ISO. $\endgroup$
    – joojaa
    Sep 21 at 15:25
  • $\begingroup$ I have seen most of these in practice (in drawing books and circulated product drawings) as Abel and Mike mentioned. $\endgroup$
    – Kuhrta
    Sep 27 at 2:58
  • $\begingroup$ Thanks Joojaa, great to hear confirmation from specific standards. This is exactly what i'm after. $\endgroup$
    – Kuhrta
    Sep 27 at 2:58


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