item required. An explanation of notes and I or codes used in this column appear at the end of the figure(s) breakdown.
The description column contains the following subcolumns.
(1) Reference number and manufacturer's code. Indicates a part number or other reference number for the
listed item, followed by the applicable five-digit Federal supply code for manufacturers, in parentheses.
(2) Usable on code. Indicates an alpha coding to reflect the application of the listed item to the specific
manufacturer's model designation. No entries in this column indicate the item listed applies to all models. See paragraph
B4 for identification of the usable on codes.
d. Unit of Measure (U/M), Column 4. A two-character alphabetical abbreviation indicating the amount or quantity of
the item upon which the allowances are based (e.g., FT, EA. PR).
e. Quantity Incorporated in Unit. Column 5. Indicates the quantity of the item used in the assembly. A "V" appearing
in this column in lieu of a quantity indicates that a definite quantity cannot be indicated.
f. Thirty-day GS Maintenance Allowance, Column 6.
(1) The allowance column is divided into three subcolumns. Indicated in each subcolumn, opposite the first
appearance of each item, is the total quantity of items authorized for the number of equipment supported. Subsequent
appearances of the same item will have the letters "REF" in this column. Items authorized for use as required, but not for
initial stockage, are identified with an asterisk (*) in the allowance column.
(2) The quantitative allowance for GS level of maintenance will represent initial stockage for a 30-day period for
the number of equipments supported.
(3) Determination of the total quantity of parts required for maintenance of more than 100 of these equipments
can be accomplished by converting the equipment quantity to a decimal factor by placing a decimal point before the next to
last digit of the number to indicate hundredths, and multiplying the decimal factor by the parts quantity authorized allowance
for 51100 allowance column. Example: authorized allowance for 51 100 equipments is 40; for 150 equipments. multiply 40
by 1.50, or 60 parts required.
(4) The basis ,f issue for authorized special tools, test and support equipment is the number of end items of
g. One year Allowance per 100 Equipments/Contingency Planning Purposes. Column 7. Indicates opposite the first
appearance of each item. the total quantity required for distribution and contingency planning purposes. The range of
items indicates total quantities of all authorized items required to provide for adequate support of 100 equipments for 1
h. Depot Maintenance Allowance per 100 Equipments, Column 8. Not applicable.
i. Illustration, Column 9. Illustrations appear in the narrative portion of this manual. This column is divided as follows:
(1) Figure number. column 9a. Indicates the figure number of the illustration in which the item is shown.
Appearance of the letters 'NISUP" in this column indicate maintenance supplies located in Section II, the letters "TOOL"
indicate special tools located in section III.
(2) Item number, column 9b. Indicates the callout number to reference the item in the illustration.
B-4. Special Information. Identification if the usable on codes included in column 3 of sections II and
and III are: