Standards for Drawings On GlobalSpec

STANDARDS FOR DRAWINGS

Shop Prints, Reading and Interpreting

Table 1: American National Standard for Engineering Drawings *ANSI Y14.2M-1979, R198*7
Visible Line
Hidden Line
Section Line
Center Line And Symmetry Line
Dimension Line Extension Line And Leader
Cutting-Plane Line Or Viewing-Plane Line
Break Line
Phantom Line
Stitch Line
Chain Line

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.

Table 2: American National Standard Symbols for Section Lining *ANSI Y14.2M-1979, R198*7
	Cast and Malleable iron (Also for general use of all materials)		Titanium and refractory material
	Steel		Electric windings, electro magnets, resistance, etc.
	Bronze, brass, copper, and compositions		Concrete
	White metal, zinc, lead, babbitt, and alloys		Marble, slate, glass, porcelain, etc.
	Magnesium, aluminum, and aluminum alloys		Earth
	Rubber, plastic electrical insulation		Rock
	Cork, felt, fabric, leather, fiber		Sand
	Sound insulation		Water and other liquids
	Thermal insulation		Wood-across grain Wood-with grain

Table 3: American National Standard Symbols for Datum Referencing in Engineering Drawing *ASME Y 14.5M-1994*

Figure 1: Basic Dimension Symbol

Figure 2: Feature Control Frame with a Projected Tolerance Zone

Figure 3: Dimension Origin Symbol

Figure 4: Datum Feature Symbol

Figure 5: Projected Tolerance Zone Specified

Figure 6: Datum Target Symbol

Figure 7: Order of Precedence of Datum References

Allowances and Tolerances

ALLOWANCES AND TOLERANCES ANSI Standard Limits and Fits (ANSI B4.1-1967, R1979). This American National Standard for Preferred Limits and Fits for Cylindrical Parts presents definitions of terms... (Read More)

Part 5: Indexes

Chapter List Chapter 21: Visual Index Chapter 22: Index A ACS 22 Angularity 18, 45,... (Read More)

Chapter 6: Datum Symbols

When the toleranced feature is related to a datum, a datum letter(s) is shown in the tolerance frame. The datum is represented on the drawing in the following way: Figure 6.1: Datum symbol... (Read More)

Chapter 4: Symbols

Table 4.1: Geometrie characteristic symbols Features Tolerance type Characteristic Symbol Page For single features (not related to a datum) Form Cylindricity... (Read More)

Chapter 21: Differences between ISO Standards and other Standards

21.1 ASME Y14.5M 1994, ANSI B89.3.1 In the following the terminology of ASME Y14.5 is used (see Table 21.3). 21.1.1 Symbols The National Standard of the United States of America ASME... (Read More)

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