MIL-DTL-3643 Connectors, Coaxial, Radio Frequency, Series Hn, And Associated Fittings, General Specification ForThis specification covers the general requirements for weatherproof, series HN-radio-frequency, coaxial connectors and associated fittings. These connectors have a nominal impedance of 50 ohms, an operating voltage of 1,500 volts root mean square, and a nominal operating frequency range of 0 to 10,000 MHz \(see 6.1 and 6.3\).

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12

MIL-DTL-3643B

4.4 Methods of examination and test.

4.4.1 Visual and mechanical examination. Connectors and associated fittings shall be examined to

verify that the design, construction, physical dimensions, marking, and workmanship are in accordance

with the applicable requirements (see 3.1, 3.3 to 3.3.5, incl, 3.6, and 3.7).

4.4.1.1 Gage tests for contacts (piece parts).

4.4.1.1.1 Center contacts (female). The center contacts shall be subjected to the gage tests specified

in 4.4.1.1.1.1 to 4.4.1.1.1.3, inclusive, prior to assembling the center contact in the connector. The pins

used in the performance of these tests may be tapered at their ends to facilitate insertion, but the tapered

portions shall not be included in the specified dimensions (see 3.3.3.1).

4.4.1.1.1.1 Test 1. A pin .058 inch (1.47 mm) maximum diameter inserted to a depth of .093 inch

(2.36 mm) shall make contact with all four contact members. A pin of .084 inch (2.13 mm) minimum

diameter shall be inserted into the center contact to a depth of not less than .187 inch (4.75 mm), and

then removed. When contacts are fixed in such a manner that removal for this test is not possible, the

test pin shall be .072 inch (1.83 mm) minimum diameter in lieu of .084 inch (2.13 mm).

4.4.1.1.1.2 Test 2. All contact members shall make contact with a pin .062 inch (1.57 mm) maximum in

diameter, within .031 inch (0.79 mm) of their tip ends, when this pin is inserted to a minimum depth of

.187 inch (4.75 mm).

4.4.1.1.1.3 Test 3. When a pin .065 inch (1.65 mm) minimum in diameter is inserted to a minimum

depth of .187 inch (4.75 mm), a .120 inch (3.05 mm) diameter contact shall pass through a cylindrical

hole .122 inch (3.10 mm) maximum in diameter, and a .131 inch (3.33 mm) diameter contact shall pass

through a hole of .133 inch (3.38 mm) maximum diameter and .5 inch (12.7 mm) minimum in length, when

a maximum force of 2 pounds is applied. This test shall be applied only to those connectors with

removable female contacts.

4.4.1.1.2 Outer contacts. All contact members shall make contact within .031 inch (0.79 mm) of their

tip ends, with a ring having an inside diameter of .560 inch (14.22 mm) minimum. All contact members

shall then enter a ring having an inside diameter of .570 inch (14.48 mm) maximum, when a maximum

force of 5 pounds is applied (see 3.3.3.2).

4.4.1.2 Gage tests for contacts (assembled connectors).

4.4.1.2.1 Center contact (female). The center contact shall accept a pin having a maximum diameter

of .063 inch (1.60 mm), when a minimum force of 1 pound is applied.

4.4.1.2.2 Outer contact. The outer contact shall accept a ring having a minimum diameter of .558 inch

(14.17 mm), when a minimum force of 1 pound is applied.

4.4.1.3 Outer contact form over. A withdrawal force of 25 pounds shall be applied to the outer contact.

The force shall be applied to and in the direction away from the connector body and along the longitudinal

axis (see 3.3.3.3).

4.4.1.4 Assembly and rotation. The assembled coupling nut shall be subjected to a force of 100

pounds gradually applied relative to and in a direction away from the connector body and along a

longitudinal axis. The coupling nut shall then be examined for free finger turning (see 3.3.4).