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MIL-DTL-18375 Wire Rope, Flexible, Corrosion-Resisting, Nonmagnetic, For Aircraft ControlThis specification covers the requirements for nonmagnetic, corrosion-resistant steel wire rope used in aircraft flight controls. The 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 aircraft wash-down and other environmental stresses and aircraft experiences.

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

MIL-DTL-18375H

TABLE III. Qualification and conformance tests and inspections.

Tests

Requirement

Qualification

Conformance

paragraph

Workmanship and finish

3.6

4.5.1.1

Preforming of wires and strands

3.3.1.2

4.5.1.2

Identification of product

Breaking strength

Endurance test

Stretch test

Ductility of steel

Test load

Magnetic permeability

3.4.6

4.5.7

TABLE IV. Dimensions of test sheaves used in endurance test. 1/

C 2/ 3/

G 2/

Sheaves ratio

Construction

(D/d)

+ .015

Nominal

+1/64

+.005

+.002

diameter of

-1/64

-.000

wire rope (d)

in.

1/16

7x7

16.0

1.188

3/8

1.000

0.036

3/32

7x7

13.5

1.531

3/8

1.250

0.052

1/8

7 x 19

7.0

1.250

3/8

0.875

0.069

5/32

7 x 19

9.5

1.953

3/8

1.484

0.086

3/16

7 x 19

9.5

2.343

1/2

1.781

0.102

7/32

7 x 19

9.5

2.734

1/2

2.078

0.118

1/4

7 x 19

9.5

3.125

1/2

2.375

0.134

9/32

7 x 19

9.5

3.515

1/2

2.671

0.150

5/16

7 x 19

9.5

3.907

9/16

2.969

0.167

3/8

7 x 19

9.5

4.687

9/16

3.562

0.200

1/ The dimensions of the test sheaves are test parameters only and are by no means intended as design criteria.

2/ Reference dimension may be varied at manufacturer's direction.

3/ C=D+3d