Volume 1 of 2
MIL-HDBK-162A
APPENDIX A
15 December 1965
NOMENCLATURE POLICY (cont'd)
3. Nomenclature assignments will remain unchanged regardless of later changes in installation and/or
applications.
4. All officially assigned JETDS nomenclatures shall be unclassified in order to provide a ready means of
identification, in correspondence and other means of communication, in the clear.
Important. - All personnel are cautioned against originating or changing any part of any nomenclature
assignment, including modification letters, without authorization.
EXPLANATION OF THE SIGNAL CORPS NOMENCLATURE SYSTEM
Signal Corps Nomenclature consists of a name and a type number. Example: Radio Receiver BC-301-A. The prefix
letters, such as "BC" in the above example, designate classes of equipment as shown in the following list. The suffix
letters, such as "A" in the above example, designate different versions or models of similar equipments.
In some cases, a nomenclature assignment with parenthesis, ( ), following the basic type number is made to identify
an article generally, when a need exists for a more general identification than that provided by nomenclature assigned to
specific designs of the article. Example: Radio Transmitter BC-325-( ).
LIST OF PREFIX LETTERS USED WITH TYPE NUMBERS
A ............................................
Phantom antennas.
AH ..........................................
Guy anchors.
AL...........................................
Aerial communication.
AN ..........................................
Antenna aerials. Made up of a definite length of antenna wire having the ends prepared for
attaching to masts or other supports.
AP ..........................................
Aerial communication panel sets.
AR ..........................................
Lightning arresters.
BA ..........................................
Primary batteries, wet and dry.
BB ..........................................
Storage batteries, lead and Edison.
BC ..........................................
Radio receivers, radio transmitters, control boxes, etc.
BD ..........................................
Power boards, switchboards, and panels for electrical control.
BE ..........................................
Starting boxes, apparatus boxes, cabinets, outlet boxes and the like with electrical internal
components (other than radio boxes).
BG..........................................
Bags, carrying cases, empty tool rolls, tool cases, and fabric covers.
BK ..........................................
Circuit breakers and relays (other than telegraph).
BL...........................................
Connecting blocks.
BR ..........................................
Brushes, motor and generator.
BX ..........................................
Boxes, smaller than chests.
BZ ..........................................
Buzzers.
C ............................................
Induction coils, transformers (other than power transformers - See TF) linking and coupling coils.
CA ..........................................
Capacitors, variable and fixed.
CB ..........................................
Cording sets and cording equipments (usually they are not part of radio sets).
CC (1 to 49) ............................
Telephone switchboard transmitter and receiver cords.
1A-8
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