Figure 3-3.-Bill of Material block.

standardized by the military. A Bill of Material block for

an electrical plan is shown in figure 3-3.

Application Block

The Application block (fig. 3-4) is usually located

near the Title block and identifies directly or by

reference the larger units of which the detail part of

assembly on the drawing forms a component. The Next

Assembly column shows the drawing number or model

Figure 3-4.-Application block.

number of the next larger assembly to which the drawing

applies. The Used On column shows the model number

of paint, enamel, grease, chromium plating, and similar

or equivalent designation of the assembled units of

coatings.

which the part is a component.

Notes and Specifications

Finish Marks

Blueprints contain all the information about an

Finish marks

are used on machine drawings to

object or part that can be presented graphically-that is,

indicate surfaces that must be finished by machining.

in a drawing. A considerable amount of information can

Machining provides a better surface appearance and

be presented this way, but supervisors, contractors,

provides the fit with closely mated parts. In

manufacturers, and craftsmen require more information

manufacturing, during the finishing process, the

that is not adaptable to the graphic form of presentation.

required limits and tolerances must be observed.

Information of this type is given on the drawings as

Machined finishes should not be confused with finishes

Figure 3-3.-Bill of Material block.

3-6