MIL-DTL-642/4B
The Part or Identifying Number (PIN) consists of the letter M, the basic specification number, the
specification sheet number, and dash number for plug type. (see table I)
M
642
/4
-
1
Type designation
Specification sheet number
Specification number
M prefix
PIN example: M642/4-1 indicates type PJ-055B telephone plug.
TABLE I. PIN.
Dash number
Type designation
Shell material
PJ-055B
Black plastic
1
PJ-055R
Red plastic
2
PJ-055M
Metal
3
Marginal notations are not used in this revision to identify changes with respect to the previous issue due
to the extent of the changes.
Referenced documents. In addition to MIL-DTL-642 this document references the following:
MIL-DTL-642/12
SC-A-7674
CONCLUDING MATERIAL
Custodians:
Preparing activity:
Army CR
DLA - CC
Navy EC
Air Force 85
(Project 5935-2013-048)
DLA - CC
Review activities:
Army AT, AV, CR4, MI
Navy AS, MC, OS, SH
Air Force 19, 99
NOTE: The activities listed above were interested in this document as of the date of this document.
Since organizations and responsibilities can change, you should verify the currency of the information
above using the ASSIST Online database at https://assist.dla.mil.
3