(a) Reference Number. A reference number (REFNO). used to identify
or partially identify an item of supply. Included are Manufacturer Part Numbers,
Drawing, Model, Type Numbers, Source Controlling Document Numbers, Specification
Numbers, and Trade Numbers (when the manufacturer identifies an item by trade name
only). The Reference Numbers in the MCRL-l are listed in alphanumeric sequence.
(b) Commercial and Government Entity Code. A commercial and
government entity (CAGE) code assigned to establishments that either fabricate items
of production or have design control of items procured by the Federal Government.
CAGE codes are also assigned to identify certain Military Specifications or Standards
and to identify certain numbering systems developed by Government Agencies. Codes
are listed in Cataloging Handbook H4.
(c) National Stock Number. The 13-digit number assigned to an item
of supply under the Federal Catalog System.
(d) Item Standard Code. An item standard code (ISC) code
representing the Item Standardization decision or individual items based on release and
procedures established in the DOD Standardization Manual.
(e) Reference Number Variation Code. A reference number variation
code (RNVC) indicates that a cited reference number is or is not item identifying, or is
for information only.
(f) Reference Number Category Code. A reference number category
code (RNCC) designates the relationship of the referenced number to the Item of
(g) Service/Agency Designator Code. A service/agency designator
code (SADC) is a one character alphabetic code that designated the Service/Agency
that accepted the NSN as a substitute for the NSN the referenced number was originally
assigned to. If more than one Service/Agency is involved, the phrase "ADDITIONAL
SADC" appears and the additional Service/Agency designator codes are listed.
(h) Description Availability. The description availability (DA) code is
generated from the type of Item Identification (II). An "N" (No Description Available) will
appear for Type 2 IIs. This field is blank for all other types of lIs, which indicates that a
description is available in the DIDS Total Item Record (TIR).
Item Name. The first 15 characters of the item name are displayed
in this field.
(2) Master Cross Reference List -2. Listed in NSN sequence, the MCRL-2
contains the same data elements as the MCRL-l. In addition, the MCRL-2 displays
replacement NSN's for all cancelled NSN's when a replacement NSN is registered. It
also reflects all active NSN's that do not have any reference numbers listed in the DLSC