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 TM
3-4240-286-20&P
(3) Third. Identify the item on the illus-
h. Quantity Incorporated in Unit. Indicates
tration and note the illustration figure
the quantity of the item used in the breakout
and item number of the item.
shown on the illustration figure, which is
prepared for a functional group,
(4) Fourth. Using the Repair Parts
subfunctional group, or an assembly. A "V"
Listing, find the figure and item
appearing in this column in lieu of a quantity
number noted on the illustration.
indicates that no specific quantity is
b. When National Stock Number or Part
applicable, (e.g., shims, spacers, etc).
Number is Known:
(1) First. Using the Index of National
Stock Numbers and Part Numbers,
C-4. SPECIAL INFORMATION.
find the pertinent National stock
a. Usable on codes are shown in description
number or part number. This index is in
column. Identification of the usable on codes
NIIN sequence followed by a list of part
used in this publication are:
numbers in alphameric sequence,
Code
Used On
cross-referenced to the illustration
Ell
M12 Protective Entrance
figure number and item number.
Z0l
M56 Gas-Particulate Filter Unit
(2) Second. After finding the figure and
Y02
M263 Installation Kit
item number, locate the figure and item
number in the repair parts list.
b. Detailed manufacturing instructions for
items source coded to be manufactured or
C-6. ABBREVIATIONS.
fabricated are found in appendix E of this
manual. Bulk materials required to
Explanation
Abbreviation
manufacture items are listed in the Bulk
cubic feet per minute
CFM . . . . . . . . . . . . .
Material Group of this manual.
diameter
dia . . . . . . . . . . . . . . .
c. Action change codes indicated in the
head
hd . . . . . . . . . . . . . . . .
lefthand margin of the listing page denote
hexagon
hex . . . . . . . . . . . . . . .
the following
inch
in. . . . . . . . . . . . . . . .
inside diameter
id . . . . . . . . . . . . . . . .
Indicates an added item.
N
long
lg . . . . . . . . . . . . . . . .
Indicates a change in data.
C
manufactured
MFD . . . . . . . . . . . . .
Indicates a change in NSN only.
R
mounting
mtg . . . . . . . . . . . . . .
National Pipe Standard
NPS . . . . . . . . . . . . . .
C-5. HOW TO LOCATE REPAIR PARTS.
nominal
nom . . . . . . . . . . . . . .
number
no. . . . . . . . . . . . . .
a. When National Stock Number or Part
overall
oa . . . . . . . . . . . . . . . .
Number is Unknown:
outside diameter
od . . . . . . . . . . . . . . . .
(1) First. Using the table of contents de-
plus or minus
porm . . . . . . . . . . . . .
termine the functional group within
PSI . . . . . . . . . . . . . .
pounds per square inch
which the item belongs. This is neces-
thick
thk . . . . . . . . . . . . . . .
sary since illustrations are prepared for
thread
thd . . . . . . . . . . . . . . .
fictional groups, and listings are di-
United National Course
UNC . . . . . . . . . . . . .
vided into the same groups.
United National Fine
UNF . . . . . . . . . . . . .
(2) Second. Find the illustration cover-
with
W/ . . . . . . . . . . . . . ..
ing the fictional group to which the
item belongs.
C-4(C-5 Blank)
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