A-57

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Dimensions shown in inches (mm)

Specifications and dimensions subject to change

A

MIL-C-26482 Specifications

The following excerpts are some of the paremeter requirements of the MIL-C-26482 specification.

Test

Paragraph

Description

Reference

Requirements

Contact

4.6.32.1

Retention

Contact

4.6.11

Insertion/Extraction

(KPSE only)

Coupling

4.6.3

Torque

Durability

4.6.17

Insert Retention

4.6.29

Insulation Resistance

4.6.7.1

Vibration

4.6.21

Shock

4.6.23

Thermal

4.6.12

Shock

Humidity

4.6.25

Air Leakage

4.6.15.1

(KPT Only)

Salt Spray

4.6.19

(Corrosion)

Fluid Immersion

4.6.27

After preloading to 3 pounds maximum, the force shall be applied at a rate of approximately 1 pound per second and

maintained at full load for 5-10 seconds.. No damage to contacts or insert shall result nor shall the contacts be dislocated

from their normal position in the connector more that 0.012 inch under giveload for KPSE and within 1 minute after the

load is removed for KPT.

Contact Size

20

16

12

Load in Pounds Min.

15

25

25

Load in KG Min.

6.8

11.3

11.3

When using the proper insertion and extraction tools the forces required to insert or extract the contact shall not exceed 20

Lbs. Connectors shall be less endbell.

For qualification testing, mating halves shall be coupled and uncoupled, measuring the torques necessary. The torques

required to couple and uncouple mating connectors halves shall fall within the limits specified as follows:

Torque in lb (NM)

Torque in lb. (NM)

Shell Size

Max

Min.

Shell Size

Max

Min

8

8 (.90)

1 (.11)

18

28 (3.16)

4 (.45)

10

12 (1.36)

1 (.11)

20

32 (3.62)

6 (.68)

12

16 (1.81)

2 (.23)

22

36 (4.07)

7 (.79)

14

20 (2.26)

4 (.45)

24

44 (4.97)

7 (.79)

16

24 (2.71)

4 (.45)

Connector halves shall be mated and unmated 500 times at a rate of 200 ± 100 cycles per hour. The test may be performed

by hand or by mechanical means, but the coupling ring shall be operated as in normal service. Failure to complete this test

because of mechanical malfunction shall be cause for rejection.

Connectors with the endbells and gromments (if possible) removed shall be subjected to a 75 psi load on the insulator in

both directions. The load shall be applied at a rate of 10lb/sec. and held for 5 to 10 secs. Insulators shall not be dislodged

from their original position.

On unmated connectors at 25ºC ±3ºC a potential of 500 VDC ±10% shall be applied between all, but not more than 6, pairs

of adjacent contacts and between all, but not more than 6, contacts and the shell. Failure to meet a minimum requirement

of 5,000 megohms shall be cause for rejection.

Wired, mated connectors shall be subjected to the vibration test of MIL-STD-1344, Method 205, Test Condition II. Receptacles

shall be mounted on the vibration fixture by normal means. All contacts shall be wired in a series circuit and 100 max. mil-

liamperes of current shall be allowed to flow through the series circuit during vibration. Suitable means shall be employed to

monitor the current flow and to indicate any discontinuity of more than 10 microseconds. The wire bundle shall be clamped

to nonvibrating points at least 8 inches from the rear of the connector. Current discontinuity of 10 microsecond or more, dis-

engagement of the mated connectors, evidence of cracking, breaking, or loosening of parts shall be cause for rejection.

Wired, mated connectors shall be subject to one shock in each direction in each of three mutually perpendicular axes. The

pulse shall be approximate half sine wave of 50g±15% magnitude with a duration of 11 ± 1 milliseconds. Receptacles shall

be mounted on a shock fixture by normal means. All contacts shall be wired in a series circuit and 90-110 ma. of current

shall flow through the series circuit during shock. Suitable means shall be employed to monitor the current flow and to indi-

cate any discontinuity of more than 10 microseconds. Current discontinuity of 10 microseconds or more, disengagement of

the mated connectors, evidence of cracking, breaking, or loosening of parts shall be cause for rejection.

Wired, unmated plug and receptacle shall be subjected to 5 cycles of hot and cold temperatures. Maximum temperature

shall be +125ºC and the minimum shall be -55ºC. The temperature extreme shall be 1/2 hour minimum. Cracking, breaking

or loosening of parts shall be cause for rejection.

The connectors shall be subjected to varying humididity, 50% to 95%, conditions for a period of 10 days KRSE or 20 days

KPT. The insulation resistance shall not be less than 100 megohms.

A 30 psi pressure differential shall be applied across the connector for 30 minutes. The leak rate, in either direction, shall be

no greater than 1 atmosphere cubic inch per hour (4,55 X 10 -3 cm3/S) at -67ºF (-55ºC).

Unmated and wired connectors shall be subject to a salt fog for 48 hours. These shall be no exposure of base metal, the con-

nector shall be functional and meet the contact resistance requirement.

At least one connector, unmated and wired, shall he immersed in each fluid for a period of 20 hours then dried for an hour.

Connectors shall be able to make and meet the coupling torque requirements. a) Hydraulic Fluid per MIL-H-5606, b)

Lubricating Oil per MIL-L-7808

Cannon KPT/KPSE

MIL-C-26482 Series I Connectors

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