MIL-PRF-39012E
1.2.2 Categories. The categories of connectors are designated by an A (field serviceable), B (non-
field replaceable), C (field replaceable solder center contact), D (field replaceable crimp center
contact), E (field replaceable) and F (field replaceable crimp, for semirigid cable) as follows:
a. Category A - Connectors, which do not require special tools to assemble are designated as
category A connectors. Standard wrenches, soldering equipment, pliers, etc., are not defined as
special tools.
b. Category B - Connectors, which require special tools to be assembled are designated as
category B connectors. These connectors may be used for original installations only. Field
replacement is intended to be made by categories A, C, D, E, or F connectors, which will provide
the same form, fit and function. Category B connectors will not be stocked or procured by the
Government.
c. Category C - Connectors, which require only standard military crimping tools and standard cable
stripping dimensions to assemble, are designated as category C connectors. The standard
military crimping tool is as specified (see 3.1).
d. Category D - Connectors, which require only standard military crimp tools for the center contact
and outer ferrule, and standard cable stripping dimensions to assemble are designated as
category D connectors. The standard military crimp tool is as specified (see 3.1).
e. Category E - Connectors using semi-rigid cables with standard stripping dimensions and using
standard military tools. The method of assembly of the connector to the cable outer conductor
will be by solder.
f.
Category F - Connectors using semirigid cables with standard stripping dimensions and using
standard military assembly tools. The method of assembly of the connector to the cable will be
solderless.
1.2.3 PIN. The PIN consists of the letter "M" followed by the basic specification sheet number, and a
sequentially assigned four-digit dash number. The first digit in the dash number designates the material
and plating of the connector body (shell); i.e., "0" for silver plated brass, "3" for passivated corrosion-
resistant steel, "4" for gold plated copper beryllium, or "7" for nickel plated brass.
Example:
M39012/
01
-
XXXX
General specification
Dash number from
specification sheet (see 3.1)
Specification sheet
The "-" designates a standard military PIN. This position, when filled with the letter `B' (i.e.
M39012/01BXXXX), signifies a military PIN, which is for OEM use only. The part is assembled to the
cable with special tooling. Acquisition of this type part by any agency other than OEM's is prohibited and
will result in the substitution of the equivalent military replacement part (i.e., if "M39012/01BXXXX" is
submitted for acquisition, "M39012/01-XXXX" will be recommended.)
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