MIL-DTL-83420 Wire Rope, Flexible, For Aircraft Control, General Specification ForThis specification covers the requirements for carbon steel and corrosion resistant steel aircraft control flexible wire rope. Type I wire rope will be capable of operation within a -65 degrees F to +250 degrees F \(-54 degrees C to +121 degrees C\) temperature range in wind, dust, fuel, and oil spills, in wash-down and other environmental stresses and aircraft experiences. Type II wire rope will be capable of operation within a -65 degrees F to +200 degrees F \(-54 degrees C to +94 degrees C\) temperature range in wind, dust, fuel, and oil spills, in wash-down and other environmental stresses and aircraft experiences.

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MIL-DTL-83420M

3.2 Qualification. Wire rope (see 6.4.16) furnished under this specification shall be

products that are qualified for listing on the applicable qualified products list at the time of award

of contract (see 4.2 and 6.3). Products must be qualified by a test facility located in the

continental United States or Canada (see 4.1). The qualifying activity will be advised of any

plant relocation, changes in key personnel, or major process change(s) (e.g. changes in lubricant

and/or jacketing material, changes in the lubricant application process, etc.) for requalification

testing determinations.

3.2.1 Wire rope for type II. The wire rope that is to be nylon jacketed to form type II

must be qualified as type I, composition A or B, wire rope in accordance with the provisions of

this specification. Upon type I wire rope being subjected to subsequent processing for

qualification or manufacture as a type II wire rope, it shall not be certified or shipped as a type I

wire rope. Type II wire rope shall not be remanufactured into type I wire rope.

3.3 Materials and protective coating.

3.3.1 Steel for composition A. High carbon steel in accordance with SAE AMS-STD-66

shall be used for composition A wire rope and shall be of one type. The carbon steel shall be

capable of meeting the requirements of this specification.

3.3.2 Steel for composition B. Corrosion resistant steel S30200 or S30400 in accordance

with SAE HS-1086 shall be used for composition B, type I and II, wire rope.

3.3.3 Protective coating. Composition A wires shall be thoroughly and uniformly coated

by the methods specified in 3.3.3.1 or 3.3.3.2 (see 6.2).

3.3.3.1 Zinc coating for composition A. Zinc coating of composition A wires shall be by

the hot dipped or electroplated process and shall conform to the following:

Minimum weight of

Wire diameter

zinc coating (oz./sq. ft.)

0.005 to 0.010 inch

0.03

Over 0.010 to 0.015 inch

0.05

Over 0.015 to 0.028 inch

0.10

Over 0.028 to 0.060 inch

0.20

3.3.3.2 Tin coating for composition A. Tin coating over zinc of composition A wires

shall be by the hot-dipped or electroplated process and shall conform to the following:

Minimum weight of

tin coating (oz./sq. ft.)

Wire diameter

0.005 to 0.010 inch

0.003

Over 0.010 to 0.015 inch

0.005

Over 0.015 to 0.028 inch

0.010

Over 0.028 to 0.060 inch

0.015