MIL-DTL-27599 Connectors, Electrical, Circular, Miniature, High Density, Quick Disconnect, Environment Resistant, Solder Contacts, General Specification ForThis specification covers two series of miniature, high density, quick disconnect, bayonet coupling, circular, environment resistant, electrical connectors capable of continuous operation within a temperature range of -65 Degrees C to +175 Degrees C \(see 6.1\). These connectors are intermateable with applicable series I and series II connectors of MIL-DTL-38999. These connectors are supplied under a MIL-STD-790 reliability assurance program. See 6.1 for restrictions on intended use and applications.

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MIL-DTL-27599D

3.4.7.2 Shells. Unless otherwise specified, the finish on shells and accessory hardware shall be in

accordance with the following designations:

Nickel plate a minimum of 0.0002 inch followed by cadmium plate 0.0001 inch minimum in

accordance with SAE-AMS-QQ-P-416, type II. A preliminary plate of other metal is

permissible. The final finish shall be electrically conductive and shall be silver or light

iridescent yellow in color.

Olive drab cadmium plate in accordance with SAE-AMS-QQ-P-416 over a suitable

underplate to withstand 500-hour salt spray test. Final finish shall be electrically conductive.

Pure dense electrodeposited aluminum in accordance with MIL-DTL-83488, to withstand

500 hours salt spray.

Nickel fluorocarbon polymer, nickel with fluorocarbon polymer additives over a suitable

underplate to withstand 500 hour salt spray.

Zinc nickel alloy in accordance with ASTM B841, over a suitable underplate to withstand

500 hour salt spray. Color shall be matte olive drab.

3.4.7.2.1 Shell spring fingers. Shell spring fingers shall be suitably protected to prevent corrosion.

3.5 Interchangeability. All connectors having the same PIN shall be completely interchangeable with

each other with respect to installation and performance.

3.6 Temperature cycling. When tested as specified in 4.6.2, there shall be no damage detrimental to

the operation of the connector.

3.7 Coupling torque. When tested as specified in 4.6.4, the coupling torque for mating and unmating

of counterpart connectors shall meet the requirements in table I.

3.8 Durability. When tested as specified in 4.6.5, the connectors shall show no defects detrimental to

the operation of the connectors and shall meet the subsequent test requirements (see 4.4.3).

3.9 Insulation resistance. When tested as specified in 4.6.6, the insulation resistance between any

pair of contacts and between any contact and the shell shall be greater than 10,000 megohms. Insulation

resistance after humidity shall be 100 megohms minimum.

3.10 Dielectric withstanding voltage. When tested as specified in 4.6.7, connectors or contacts as

applicable shall show no evidence of flashover or breakdown.