D38999/49 Defense Supply Center, D38999/49 Datasheet - Page 39

• Manufacturer Part Number: D38999/49
• Description: D38999K / D38999J 500 Cycle Contact
• Manufacturer: Defense Supply Center

measured from solid reference points on the connector halves. The mating operation shall then be
continued until the connector halves are in the completely mated position. A second overall length
measurement shall then be taken from the same reference points. The difference of these two
measurements shall be not less than specified in 3.18. Both the outer shield and inner conductor circuits
shall be included in the test of shielded contacts.
service to a rigid panel. Before mating the plug connector to the receptacle, an adapter or test torque arm
shall be attached as shown on figure 22. After mating the plug and receptacle connectors, the distance "L"
from the point of load application "P" to the mounting panel shall be determined. The load to be applied at
point "P" shall then be determined as the bending moment listed in table XVI divided by the level arm "L".
This load shall be applied at a rate of approximately 10 pounds per second until the required load is
achieved. The applied load shall be held for 1 minute, then the load shall be released. Continuity of the
contacts shall be monitored during the test. The test circuit used to monitor this shall be capable of
detecting a discontinuity in excess of 1 microsecond.
be subjected to 50 +5, pounds load applied to the swaged end along the major axis of the coupling on
swaged pins, and perpendicular to the pin centerline on the exposed portion of welded or brazed pins. A
steel test tip shall be used for application of the load on swaged pins. A steel test fixture contoured to the
shape of the coupling pin shall be used for application of the load on the welded or brazed pins.
shall be installed in three randomly selected cavities in each connector, with the accessory rear hardware
removed. With each test gauge fully seated back against its contact retention device, the axial location of
the front end of each gauge shall be measured relative to the reference point indicated on figures 1, 2, 3,
and 4, as applicable. The test shall be repeated on pin assemblies using gauges conforming to figure 17
and seating them forward in the contact cavity.
be installed in three randomly selected cavities in each connector, with the accessory rear hardware
removed. The axial load specified in 4.5.19 shall be applied to individual test gauges in both directions.
The load shall be applied at a rate of approximately 1 pound per second until the specified load has been
reached. Gauge displacement shall be measured with respect to the connector shell after an initial load of
2 pounds has been applied to assure that all slack has been taken up.
I and II.
MIL-STD-1344. The following details and exceptions shall apply:
4.5.16 Coupling pin strength (series I and II only (see 3.20). One coupling pin in each receptacle shall
4.5.19 Contact retention (see 3.23). Unless otherwise specified, contacts shall be tested to procedures
4.5.19.1 Procedure I. The contact retention shall be tested as specified in method 2007 of
4.5.15 External bending moment (see 3.19). The receptacle connector shall be mounted as in normal
4.5.17 Gauge location (see 3.21). Applicable test gauges, conforming to figures 16, 17, 18, and 19
4.5.18 Gauge retention (see 3.22). Applicable test gauges, conforming to figures 16, 20, and 21 shall
Size
11
13
15
17
19
21
23
25
9
Series I
Pound inches
230
310
380
450
500
530
650
650
75
Size
TABLE XVI. External bending moment.
10
12
14
16
18
20
22
24
8
Series II
Pound inches Size
100
125
125
125
125
150
50
75
75
MIL-DTL-38999K
39
11
13
15
17
19
21
23
25
9
Newton meters Size
Series III
101.7
113.0
11.3
33.9
45.2
56.5
67.8
79.1
90.4
11
13
15
17
19
21
23
25
9
Series IV
Newton meters
26.0
35.0
42.9
50.9
56.5
59.9
73.5
73.5
---