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Figure 4-6.—Master Cross-Reference List (MCRL), Parts I and II.
Reference numbers having too many characters to
permit complete listing on one line in the 16-character
field are considered long reference numbers and are
continued, indented one space, on the next line or lines.
Since January 1980, seven basic elements of
information were included in the MCRL. Each
microfiche includes two similar sets of data. The
information is presented as follows
Reference Number—A number, other than an
activity stock number, used to identify an item
of production.
Commercial and Government Entity—The
applicable manufacturers assigned five-digit
code as listed in the cataloging Handbook H4-2.
National Stock Number—The NSN assigned to
the reference number.
Reference Number Variation Code-A code
indicating whether the reference number is item
identifying or requires additional data to
correctly identify the item of supply.
Reference Number Category Code—A code that
designates the relationship of a reference
number to the item of supply.
Description
Available—Description
available/not available.
Item Name—Nomenclature of the item.
For a more complete description of the above titles
and their codes, refer to the NAVSUP P-4000.
LIST OF ITEMS REQUIRING SPECIAL
HANDLING (LIRSH)
The LIRSH is published to identify items which
require special handling. This is a reference publication
4-10
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