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I dont know what those sign mean in drafting ?


New member
can anybody help me about symbols and signs in drafting ? for example A letter downside of the circle which cut throuh center with line ?


Super Moderator
If you're asking about the Ø symbol, this is the international drafting symbol for a diameter.

Here's a link that shows a list of various mechanical drafting symbols: http://www.draftingzone.com/shoppingzone/6-1.pdf

If you have a different symbol, please attach a picture of the symbol you're asking about and a picture of the entire drawing to help us provide an exact answer.
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