TABLE OF CONTENTS | Visible Line |
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| Hidden Line |
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| Section Line | |
| Center Line And Symmetry Line |
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| Dimension Line Extension Line And Leader |
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| Cutting-Plane Line Or Viewing-Plane Line |
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| Break Line |
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| Phantom Line |
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| Stitch Line |
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| Chain Line |
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Approximate width of THICK lines for metric drawings, 0.7 mm and for inch drawings, 0.032 inch. Approximate width of THIN lines for metric drawings, 0.35 mm and for inch drawings, 0.016 inch. These approximate line widths are intended to differentiate between THICK and THIN lines and are not values for control of acceptance or rejection of the drawings.
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 | Cast and Malleable iron (Also for general use of all materials) |
 | Titanium and refractory material |
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 | Steel |
 | Electric windings, electro magnets, resistance, etc. |
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 | Bronze, brass, copper, and compositions |
 | Concrete |
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 | White metal, zinc, lead, babbitt, and alloys |
 | Marble, slate, glass, porcelain, etc. |
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 | Magnesium, aluminum, and aluminum alloys |
 | Earth |
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 | Rubber, plastic electrical insulation |
 | Rock |
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 | Cork, felt, fabric, leather, fiber |
 | Sand |
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 | Sound insulation |
 | Water and other liquids |
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 | Thermal insulation |
 | Wood-across grain Wood-with grain |
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 Figure 1: Basic Dimension Symbol |
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 Figure 2: Feature Control Frame with a Projected Tolerance Zone |
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 Figure 3: Dimension Origin Symbol |
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 Figure 4: Datum Feature Symbol |
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 Figure 5: Projected Tolerance Zone Specified |
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 Figure 6: Datum Target Symbol |
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 Figure 7: Order of Precedence of Datum References |
