Special Stockage Indicator Code and Replacement Factor

TM 9-6115-604-24P

NAVFAC P-8~633-24P

will fail, wear out, or otherwise require replacement. All

c. (USMC) Special Stockage Indicator Code and

computations are based on a replacement period of one

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

No Code

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

P4400.79

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

computations should be revised, if warranted, after

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

AxB

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-

Issue Actions.

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

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.