MIL-PRF-31031 Connectors, Electrical, Plugs And Receptacles, Coaxial, Radio Frequency, High Reliability, For Flexible And Semirigid Cables, General Specification ForThis specification covers the general requirements and tests for radio frequency connectors used with flexible RF cables and certain other types of coaxial transmission lines.

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MIL-PRF-31031B

4.6.25 Porosity (see 3.28). Contacts shall be placed in containers and covered with nitric acid

(specified gravity 1.316 at 15.6�C) at 25�C � 3�C so that all contacts may be observed during the test.

The contacts shall be observed for 30 seconds. This specific gravity only applies to the bubble test.

4.6.26 Solderability (see 3.29 ). When applicable (see 3.1), the connector component shall be

assembled to the standard test cable component using soft solder in accordance with specification

J-STD-006, and non corrosive flux type RMA. With the connector component held in a fixed position, the

specified tensile force (see 3.1) shall be applied to the cable component in the direction of the cable axis

for 30 seconds minimum. Connector to cable outer conductor and inner contact to cable inner conductor

solder joints, as applicable, shall be tested separately. These tests should be performed at the end of the

group testing.

4.6.27 Safety wire hole pullout (see 3.30). A single strand of safety wire shall be looped through the

safety wire hole and secured to itself. Forces of 67 newtons (15 pounds) minimum shall be applied to the

safety wire pulling away from the connector. One pull shall be parallel to the connector axis and one pull

shall be perpendicular to the connector axis (see figure 6). The safety wire shall be corrosion-resistant

steel .020 inch diameter (24 gauge) or .015 inch diameter (27 gauge) in accordance, with NASM20995.

This test is to be conducted under static conditions. All holes are to be tested individually.

FIGURE 6. Safety wire hole pullout procedure.

4.6.28 Thermal vacuum outgassing (class X) (see 3.31). All nonmetallic materials including lubricants,

used in the manufacture of these, connectors shall be tested in accordance with ASTM E595 to

determine the TML and VCM of the original specimen mass. For the purpose of determining the TML and

VCM of connectors shall be the assembled connector mass excluding metallic parts.

4.6.29 Flammability (see 3.32). When tested In accordance with NHB 8060.1, test 1, material

samples shall meet the requirements of 3.32.

4.6.30 Odor (see 3.33). When tested in accordance with NHB 8060.1, test 6, material samples shall

meet the requirements of 3.33.

4.6.31 Toxicity (offgassing) (see 3.34). When tested in accordance with NMB 8060.1, test 7,

material samples shall meet the requirements of 3.34.