Figure 2. MIL-DTL-22992 Connector Part Number Breakdown
10. CLASS C, J AND R CONNECTORS.
b. Class J. Class J is intended for use only where
Class C connectors can be used and a wire support
11. DESIGN APPLICATION. Class C, J and R
grommet is necessary. If this is the intended use for
connectors are intended for heavy-duty, external
the desired connector, use J for this segment of the part
application interconnection. Classes C, J and R
connectors are not for prime power distribution. For
prime power distribution use Class L connectors where
Class R. Class R is intended for general
waterproof, arc quenching features are required.
quenching are not required. The connectors can be
12. PART NUMBER DEFINITION. The following
made weatherproof when the accessory sealing
paragraphs contain information necessary for proper
adapter is attached. If this is the intended use for the
selection and procurement of MIL-DTL-22992, Class:
desired connector, use R for this segment of the part
C, J and R connectors. The part number breakdown is
shown in Figure 3, and described below. The
government certification mark "JAN" or "J" must also
15. SHELL SIZE. Use Figure 4 thru 11 to find the shell
be included in the part number.
size for Class C, J and R connectors. To identify the
shell size, use a dial caliper to measure the mating
13. MILITARY DESIGNATION/SHELL STYLE. To
thread (M Thread) of the desired connector. The
determine the shell style, see Table 1. Determine the
measurements for the accessory thread (A Thread); the
connector type (receptacle or plug), and the connector
length of the connector; or the outside diameter (OD)
configuration (wall mount, in-line, etc.). The shell
of the connector may be necessary if one measurement
styles, by class, are in the third and fourth columns.
does not conclusively identify a shell size. Match the
measured dimension(s) to the dimensions in the figure
14. CLASS. The second segment of the part number is
matrix. The shell size is in the left-hand column.
the class designation for Classes C, J, and R.
16. FINISH. This segment of the part number identifies
a. Class C. Class C is intended for external
the finish for Classes C, J, or R. The conductive (C)
interconnection use in heavy-duty (rough service)
finish is cadmium-plate over nickel-plate. The finish
applications. If this is the intended use for the desired
is olive drab, light to dark in color. The non-conductive
connector, use C for this segment of the part number.
(N) finish is a hard oxide coating. The finish is grey to
black in color. Use N or C as applicable for this segment
of the part number.