MIL-DTL-641/2E
REQUIREMENTS:
Dimensions and configuration: See figure 1.
Insertion and withdraw forces shall be as follows.
Insertion force -
7 pounds (maximum).
Withdraw force -
1.5 pounds (minimum).
-
7 pounds (maximum).
Spring life test is applicable. Test plug TP55, in accordance with MIL-DTL-641, shall be used.
Frame strength test is applicable.
Terminal of tip contact spring shall be on left side when terminals are viewed from the rear, with the jack
in a position such that the contact spring pileup is on top of the jack frame.
Cutout in jack frame shall be positioned so that a minimum of .016 inch (.4mm) clearance exists between
the tip of the TP55 plug and the edge of the frame cutout at all times during insertion of the plug.
Ground terminal shall be placed on top of pileup, as shown in schematic.
The Part or Identifying Number (PIN) consists of the letter M, the basic specification number, the
specification sheet number, and a number for jack type. (see table II)
M
641
/2
-1
Type designation
Specification sheet number
Specification number
M prefix
PIN example: M641/2-1 indicates type JJ-016 telephone jack.
TABLE II. PIN.
Switching action upon insertion
Type
Dash number
Connection
Mounting
of plug 1/
designation
1
JJ-016
One make - break
2
JJ-017
One make - break, one break
3
JJ-024
One break
4
JJ-035
One break - make
5
JJ-072
Tip and sleeve
Single lug
Two breaks
6
JJ-084
One make
7
JJ-085
Two breaks
8
JJ-086
None
9
JJ-087
One break - make, one make
1/ The hyphen indicates sequence.
3