MIL-DTL-5898H
TABLE III. Physical property requirements for jacketing
compounds of finished cord.
.020 to .030
Greater than
Less than
Jacket wall thickness inch/(mm)
.030/(.76)
.020/(.51)
(.51 to .762)
Unaged:
Tensile strength, minimum, lbf/in2
1200
1500
1800
Elongation, minimum, percent
250
250
300
Set, maximum, inch(mm)
-
-
.375(9.52)
After 166 hours of air-aging at 70°C:
Tensile strength, minimum,
75
75
75
percent of original
Elongation, minimum,
75
75
75
percent of original
After oil immersion:
Tensile strength, minimum,
percent of original
50
50
50
Elongation, minimum,
percent of original
50
50
50
3.8.2 Jacket wall thickness. The minimum wall thickness of the jacket shall be as specified in
table IV.
3.9 Outside diameter of cord. The outside diameter of the finished cord shall be as specified in
table IV.
TABLE IV. Jacket wall thickness and cord outside diameter.
Cord type:
WF-5/U
WF-14/U
WD-34/U
WM-53/U
WM-85/U
Jacket minimum
.025 (.635)
.025 (.635)
.012 (.305)
.025 (.635)
.025 (.635)
thickness, inch (mm)
Cord outside diameter,
.280 (7.11)
.300 (7.62)
.160 (4.06)
.280 (7.11)
.305 (7.75)
±.010 inch (mm)
3.10 Flexing. The finished cord shall be capable of withstanding at least 25,000 flexing cycles
without showing evidence of serious damage to the jacket such as splits or ruptures, damage to the
insulation of the individual conductors, or electrical discontinuity or short circuit.
3.11 Fungus-resistance. Materials used that are not fungus-inert shall be treated so as to render the
material fungus-resistant. The fungicide used shall have no detrimental effects on the finished cord.
3.12 Electrical requirements of finished cord.
3.12.1 Dielectric strength. The insulation on conductors shall withstand the application of 500 V ac at
60 Hz for 5 seconds without flashover or breakdown.
3.12.2 Insulation resistance. The insulation resistance shall be not less than 100 megohms per
1,000 feet at 15.6 °C.
6
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