C2, TM 11-6780-225-12
order. Where a Federal stock number is not listed, refer
for more than 100 of these equipments shall determine
to the reference number (manufacturer's part numbers)
the total quantity of parts required by converting the
immediately following the Federal stock number.
equipment quantity to a decimal factor by placing a
decimal point before the next to last digit of the number
b. When the Federal stock number is known,
to indicate hundredths, and multiplying the decimal
follow the procedures given in (1) and (2) below.
factor by the parts quantity authorized in the 51-100
(1) Refer to the index of Federal stock
allowance column. Example, authorized allowance for
numbers (sec. V) and locate the Federal stock number.
51-100 equipments is 40; for 150 equipments multiply
The FSN is cross-referenced to the applicable figure
40 by 1.50 or 60 parts required.
and reference designation.
(4) Subsequent changes to allowances will be
(2) When the reference designation is
limited as follows: No change in the range of items is
determined, scrutinize column 7b of the repair parts list
If additional items are considered
necessary, recommendation should be forwarded to
c. When neither the FSN nor reference
Commanding General, U.S.
designation is known, identify the part in the illustration
then scrutinize column 3 of the repair parts lists (sec.
Monmouth, N.J. 07703, for exception or revision to the
Revisions to the range of items
authorized will be made by the USA ECOM National
D-6. Federal Supply Code for Manufacturers
Maintenance Point based upon engineering experience,
demand data, or TAERS information.
g. Illustrations, Column 7. This column is divided
Parker Seal Co.
General Electric Co.
(1) Figure number, column 7a. Indicates the
figure number of the illustration in which the item is
Burke and James Inc.
(2) Item number or reference designation,
Columbia Ribbon and Carbon Mfg. Co. Inc.
column 7b. Indicates the reference designation used to
identify the item in the illustration.
Eastman Kodak Co.
D-4. Special Information
Square D Co.
General Electric Co.
Repair parts mortality is computed from failure rates
Goodrich B. F. Co.
derived from experience factors with the individual parts
in a variety of equipments. Variations in the specific
application and periods of use of electronics equipment,
Stonite Products Co.
the fragility of electronic piece parts, plus intangible
Imperial Division Imperial-Eastman Group I-
material and quality factors intrinsic to the manufacture
T-E Imperial Corporation
of electronic parts, do not permit mortality to be based
McMaster-Carr Supply Co.
on hours of end item use. However, long periods of
Sears Roebuck and Co.
continuous use under adverse conditions are likely to
Berkey Technical Corp.
increase repair parts mortality.
S C M Corp.
D-5. Location of Repair Parts
Sparkler Mfg. Co. Inc.
a. This appendix contains one cross reference
index (sec. V) to be used to locate a repair part when
Weston Instruments Inc.
either the Federal stock number, reference number
Ac Spark Plug Div. of General Motors Corp.
(manufacturer's part number), or reference designation
Allen Mfg. Co.
is known. The first column in the index is prepared in
Bead Chain Mfg. Co.
numerical and/or alpha-numeric sequence is ascending
Bright Star Industries Inc.