MIL-DTL-81929C(AS)
b. The assembly or subassembly shall be identified with a sequentially assigned capital
letter adjacent to the applicable index number on the main view.
c. The capital letter(s) assigned to a detail view(s) should be approximately 14-point bold
type and placed within the image area so that it is highly visible. If required for clarity, a
leader line shall be used from the subject part or assembly to the bold type letter
identifying the detail view.
d. The detail illustration shall be identified by the same capital letter as placed in the main
view.
e. The detail view shall be boxed.
f. The detail parts shall have their index numbers placed on the detail view.
g. The detail view may be placed with the main view or on a separate page. Placement
shall be dependent on the complexity of the required detail and the open space available
on the main view. In either method, the prime consideration shall be clarity of
presentation.
3.4.1.5 Parts shown only to indicate relationship. In order to properly illustrate the
relationship of parts to assemblies shown on the illustration, it will often be necessary to include
parts not listed in the applicable GAPL. Since these parts are not indexed, they shall be subdued
to give proper emphasis to the listed assemblies or parts. Shading shall not be used to subdue
non-indexed parts. The line-weight used (for the subdued areas) shall be lighter (than the indexed
items), yet strong enough to reproduce clearly.
3.4.1.6 New assemblies and parts. If an assembly or part provided on a later model differs
from the basic model, and the change is such that the existing illustration will not adequately
portray the new assembly or part, the latter may be shown on the illustration for the basic model
in a detail view. If space does not permit, a separate illustration shall be prepared.
3.4.1.7 Symmetrically opposite parts and similar assemblies. If it is unnecessary for a clear
presentation to illustrate both right and left, top and bottom, front and rear views of similar parts
and assemblies, and if both parts have the same general appearance and purpose but different
part numbers, such parts and assemblies shall be illustrated once. An index number shall be
assigned in the listing to the first of the similar parts or assemblies listed. The difference (such as
left-hand or right hand) in the parts shall be identified in the description of the item.
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