MIL-DTL-22759/81A
Strippability: (Group II quality conformance test). Test in accordance with ASTM D 3032 section 27. The length of
the insulation slugs shall be 0.25 inches. Strip forces shall be as follows. No evidence of insulation shall be left on
the conductor when viewed with the naked eye.
Wire Size
Min. Force
Max. Force
26-20
0.25 lbs.
6.0 lbs.
Tape Overlap: In accordance with MIL-STD-2223, method 6005
Tensile Modulus: Test composite film in accordance with ASTM D 882, Method A.
Thermal index: 200°C (392°F) minimum for 10,000 hours (Test required for initial qualification only). Test size 20
only in accordance with ASTM D 3032, Section 14.
Thermal shock resistance: Oven temperature, 200°C ± 2°C (392°F ± 3.6°F), Maximum change in measurement ,
0.091 inches. No cracking.
UV Laser Marking: (Test required for initial qualification only) FP materials shall be formulated in such a manner to
achieve a 62 % minimum contrast level when marked by an Ultraviolet (UV) laser source operating at a delivered
power not to exceed 1.5 Joules/cm2. The contrast level is defined as
CL = (Reflectance of the background insulation - Reflectance of the laser mark) x 100
Reflectance of the background insulation
Wrap (mandrel wrap): No cracking, no dielectric breakdown. Use mandrels specified in Table VI. Dielectric test,
2500 volts (rms), 60 Hz.
TABLE VI. Test mandrel and test load requirements.
1/
1/
Test Mandrel Diameter
Test Load
Wire
(inches)
(lbs)
Size
(AWG)
Cold Bend
Life Cycle/
Wrap
Cold Bend
Life Cycle/
Bend Test
Bend Test
0.50
3.00
0.125
0.375
1.00
26
0.75
3.00
0.125
0.500
1.00
24
1.00
4.00
0.125
0.500
1.00
22
1.50
4.00
0.125
0.500
1.00
20
1/
Tolerance shall be ± 3 percent of the given values.
Qualification of wire:
For qualification, a source is required to submit data on quality conformance tests and any finished wire tests as
required by the qualification authorization letter. All other testing will be performed by the qualifying activity at the
source's expense.
Due to the extended time period over which the thermal index test is performed, a source may become qualified under
this specification sheet while this test is still in progress.
6
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business