MIL-PRF-55339 Adapters, Connectors, Coaxial, Radio Frequency, \(Between Series And Within Series\), General Specification ForThis specification covers the performance requirements and tests for between series and within series, radio frequency \(RF\), coaxial connector adapters.

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MIL-PRF-55339C

3.3.4 Spring members. Unless otherwise specified (see 3.1), center contact spring members shall

be made of copper beryllium.

3.3.5 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or

environmentally preferable materials should be used to the maximum extent possible, provided that

the material meets or exceeds the operational and maintenance requirements, and promotes

economically and advantageous life cycle costs.

3.4 Configuration and features. Adapters shall be of the configuration and physical dimensions

specified (see 3.1). The nominal impedance, working voltage, frequency range, and temperature

range shall be as specified (see 3.1).

3.4.1 Mating (visual indication). When applicable, a visual means for indicating complete mating

shall be as specified (see 3.1).

3.4.2 Screw threads. Screw threads shall be in accordance with FED-STD-H28 unless otherwise

specified (see 3.1).

3.4.3 Adapter interfaces. Adapter interfaces shall be in accordance with MIL-STD-348 unless

otherwise specified (see 3.1).

3.5 Center contact retention. When adapters are tested as specified in 4.5.2, the center contacts

shall withstand the axial force specified (see 3.1). The center contact shall meet the mating interface

dimensions. When a torque requirement is specified (see 3.1) there shall be no rotation of the center

contact.

3.6 Force to engage/disengage (see 4.5.3).

3.6.1 Bayonet and threaded types. When tested as specified in 4.5.3.1, the torque necessary to

completely couple or uncouple the adapters shall not exceed that specified (see 3.1). Also the

longitudinal force necessary to initiate the engaging or disengaging cycle shall not exceed that

specified (see 3.1).

3.6.2 "Push on" adapter types (with or without detents). When tested as specified in 4.5.3.2, the

forces necessary to fully engage or disengage the adapter shall not exceed that specified (see 3.1).

3.7 Coupling proof torque (threaded adapters). When tested as specified in 4.5.4, the coupling

mechanism shall not be dislodged, and the adapter shall meet requirements of 3.6.1. The interface

dimensions of the adapter shall remain as specified (see MIL-STD-348).

3.8 Mating characteristics. When adapters are tested as specified in 4.5.5, the mating dimensions

shall be gauged as specified (see 3.1) and the dimensions shall remain within the specified

tolerances (see 3.1).

3.9 Permeability of nonmagnetic materials. When adapters (except hermetic sealed and connector

hardware) are tested as specified in 4.5.6 , the permeability (Mu) shall be less than 2.0.

3.10 Hermetic seal (pressurized adapters only). When adapters are tested as specified in 4.5.7, the

leakage rate shall not exceed that specified (see 3.1).

3.10.1 Leakage (pressurized adapters only). When adapters are tested as specified in 4.5.7.1,

there shall be no leakage as detected by escaping air bubbles.