will fail, wear out, or otherwise require replacement. All
c. (USMC) Special Stockage Indicator Code and
Replacement Factor (Column 3).
year. Therefore, a replacement factor of 0.08, applied to an
item in this stock list, indicates that eight out of every one
(1) Special Stockage Indicator Code. This column
hundred such items used in the end item of equipment to
reflects the condition under which certain maintenance
which this publication pertains, is predicted to need
parts (parts assigned NSN's and coded in the "P" series
replacement in one year. Likewise, 0.004 reflects that four
source code of the SMR code) are stocked. The codes
out of every thousand in use are predicted to require
are explained as follows:
replacement in one year, while 2.0 shows that every one in
use is predicted to be replaced twice during each year.
(*) NOTE: FOR USAF programs and the USA Safeguard
(a) Initial authorized stockage levels of
Program, Code F will be used to denote intermediate
consumable and salvageable items for an organization are
maintenance. On joint programs, use of either Code F or
to be computed for predicted consumption based on the
H by the joining Service will denote intermediate
number of items employed and/or supported by an
maintenance to USAF and the USA Safeguard Program.
organization within the number of days for which stockage is
authorized. In computing Garrison Operating Stock or
Indicates that the part may or may not be
Mount-Out, authorized levels can be determined by the
authorized in initial allowances to using
requiring Marine Corps unit by multiplying the replacement
or supporting organizations. The manner
factor times the quantity used per equipment times the
of determining initial allowances is ex-
number of end items employed by the using organization or
plained in paragraph (2) below.
supported by the service organization times the authorized
Applied to maintenance parts which pre-
day level expressed in and divided by 12. Specific formulas
dicted consumption would not warrant in-
and examples are provided in Marine Corps Order, MCO
clusion in Mount-Out, but for which a
quantity of one (1) is authorized as insur-
ance for Mount-Out using a 360 day crite-
The replacement factors used in initial stockage
ria. This criteria is based on the total
density of equipments employed by the
significant usage is experienced in accordance with the
DIV/WING TEAM. Mount-Out allowances,
guidelines of MCO 4400.32A. In the following formula,
so authorized, will be stocked by the FOR
replacement factor "X" represents actual usage experience
or the MWSG in the case of Marine Wing
(1 year), "A" represents the application per equipment, and
peculiar equipment, as applicable.
"B" represents the number of equipments supported.
Applied to maintenance parts that are not
considered critical or essential to be on
hand and are, therefore, not authorized in
initial allowances; however, these items
(b) Initial allowances for maintenance float items
are stocked within the Supply System and
(recoverability codes "R" and "D") for the FMF and
may be requisitioned based upon usage.
appropriate post and stations are as furnished by Initial
Indicates that the part is authorized in gar-
rison operating allowances in order to
comply with state and local laws; however
Changes to maintenance replacement rates
the part is not authorized in Mount-Out
resulting from actual usage may require recomputation of
since it is not combat essential.
maintenance float allowances by holding units. Any
(2) Replacement Factor. This column
required recomputation of maintenance float allowances will
be made in accordance with MCO 4000.6.
reflects the replacement factor assigned to each nation-
ally stock numbered maintenance repair part. This factor
(c) The replacement factor for same as (S/A)
is assigned to the repair part on its first appearance in
items is indicated upon the first appearance of the item in
the publication. The replacement factor, expressed as a
the major combination, component or assembly.
decimal, indicates the average rate at which the type of
item so coded has been used by Marine Corps field unite
d. (ALL) National Stock Number (Column 4) indicates
or the rate at which design engineers anticipate the item
the National Stock Number assigned to the item and will be
used for requisitioning purposes.