TM 55-1680-320-23 & P
e. DESCRIPTION AND USABLE ON CODE (UOC) (Column5)). Indicates the Federal item name and, if required,
a minimum description to identify the item.
Items that are included in kits and sets are listed below the name of the kit
or set with the quantity of each item in the kit or set indicated in the quantity incorporated in the unit column. When the
part to be used differs between serial numbers of the same model, the effective aerial numbers are shown as the last line
of the description and the usable on code is utilized.
In the Special Tools List, the initial base of issue (BOI) appears at
the last line in the entry for each special tool, special TMDE, and other special support equipment. When density of
equipments supported exceeds density spread indicated in the basis of issue, the total authorization is increased accordingly,
The statement END OF FIGURE appears just below the last item description in Column 5 for a given figture in both
Sections II and III.
QTY (Column 6)). Indicates the quantity of the item used in the breakout shown on the illustration figure, which
is prepared for a functional group, sub-functional group, or an assembly.
A V appearing in this column in lieu of a
quantity indicates that no specific quantity is applicable, (e.g., shims, spacers, etc).
C-4. Explanation of Columns (Section IV).
a. NATIONAL STOCK NUMBER (NSN) INDEX.
(1) STOCK NUMBER Column.
Lists the National Stock Number (NSN) in Federal Supply Class (FSC) Se
When ordering items by stock number, the complete NSN shall be used.
(2) FIG. Column. Indicates the number of the figure where the item is located/ identified.
(3) ITEM COLUMN. Item number identifies the item as.misted with the adjacent figure. The item may also be
identified by the NSN.
b. PART NUMBER INDEX. Items in this index are listed by part number in ascending alpha-numeric sequence
(vertical arrangement of letter and number combination which places the first letter of digit of each group in order A
through Z, followed by the numbers O through 9 and each following letter or digit in like order).
(1) FSCM Column. The Federal Supply Code for Manufacturers (FSCM) is a 5-digit number code listed in SB
708-42 which is used to identify the manufacture, distributor, or Government agency, etc. that supplies the item.
(2) PART NUMBER Column. Indicates the primary number used by the manufacturer (individual, company, firm,
corporation, or Government activity), which controls the design and characteristics of the item by means of its engineering
drawings, specifications, standards and inspection requirements to identify an item or range of items.
STOCK NUMBER Column. Indicates the National Stock Number assigned to the corresponding part number.
FIG. Column. Indicates the number of the figure where the item is located/ identified in Sections II and III.
ITEM Column. Item number identifies the item associated with the adjacent figure.
C-5. Special Information.
a. Assembly Instructions. Detailed assembly instruction for items source coded to be assembled are found in Chapters
2 and 3 of this manual. Assembly components are listed immediately following the item to be assembled.