Marine Corps Stocklist
14. Special Stockage Indication Code (Column 10). This column reflects the condition under which certain
maintenance parts, (parts assigned NSN's and coded in the "P" series source code of the SMR code), are
stocked. The codes are explained as follows:
Indicates that the part may or may not be authorized in initial
No code --
allowances to using or supporting organizations. The manner of deter-
mining initial issue allowances is explained in paragraph 15 below.
Applied to maintenance parts that are not considered critical or essen-
tial to be on hand and are, therefore, not authorized in initial allow-
ances; however, these items are stocked within the Supply System and may
be requisitioned based upon usage.
Indicates that the part is authorized in garrison operating allowances
in order to comply with state and local laws; however, the part is not
authorized in Mount-Out since it is not combat essential.
15. Replacement Factor (Column 11). This column reflects the replacement factor assigned to each maintenance
repair part with an NSN. This factor is assigned to the repair part on its first appearance in the publica-
tion. The replacement factor, expressed as a decimal, indicates the average rate at which the type of item
so coded has been used by Marine Corps field units or the rate at which design engineers anticipate the item
will fail, wear out, or otherwise require replacement. All computations are based on a replacement period
of one year. Therefore, a replacement factor of 0.08, applied to an item in this stocklist, indicates that
eight out of every one hundred of such items used in the end item of equipment to which this publication
pertains, is predicted to need replacement in one year. Likewise, 0.004 reflects that four out of every
thousand in use are predicted to require replacement in one year, while 2.0 shows that every one in use is
predictad to be replaced twice during each year.
a. Initial authorized stockage levels of consumable and salvageable items for an organization are to be
computed for predicted consumption based on the number of items employed and/or supported by an organization
within the number of days for which stockage is authorized. In computing Garrison Operating Stock or Mount-
Out, authorized levels can be determined by the requiring Marine Corps unit by multiplying the replacement
factor (column 11) times the quantity used per equipment (colomn 8) times the number of end items employed
by the using organization or supported by the service organization times the authorized day level expressed
in months and divided by 12. Specific formulae and examples are provided in Marine Corps Order, MCO P4400.79.
(1) The replacement factors used in initial stockage computations, as listed in column 11, should be
revised, if warranted, after significant usage is experienced in accordance with guidelines of MCO 4400.32A.
The following formulae should be used for revising the replacement factors based on actual usage where the
symbol "W" represents the revised replacement factor, "X" represents actual usage experience (1 year), "A"
represents the application per equipment, and "B" represents the number of equipments supported.
b. Initial allowances for maintenance float items (recoverability codes "F", "H" and "D") for the FMF
and appropriate post and stations are as furnished by Initial Issue Actions.
(1) Changes to maintenance replacement rates resulting from actual usage may require recomputation
of maintenance float allowances by holding units. Any required recomputation of maintenance float allow-
ances will be made in accordance with MCO 4400.82.
c. The replacement factor for same as (S/A) items is indicated upon the first appearance of the item
in the major combination, component, or assembly.
PART II - ITEM NUMBER CROSS-REFERENCE
16. Part II consists of a cross-reference from RPL item numbers to part numbers and manufacturers' code
numbers. Part II is arranged in numerical sequence by RPL item number and contains only those items listed
in Part I which do not have an NSN.
PART III - NATIONAL STOCK NUMBER CROSS-REFERENCE
17. Part III consists of a cross-reference from NSN's to RPL item numbers, part numbers, and manufacturers'
code numbers. Part III is arranged in NSN sequence and contains only those items listed in Part I which have