MIL-DTL-87161F
loading may be used instead of unwinding the wire strand. The failure of any wire shall be cause
for rejection (see 4.4.4.1).
4.4.4.1 Use of acoustic, electronic device for test loading. The load shall be increased to
85 percent on the test specimen. If no ping (see 6.4.7) is heard, the specimen has passed the test.
If one or more pings are heard, the wire strand specimen shall be unraveled and the broken wires
shall confirm failure of the specimen. If no wire breaks are found, the specimen has passed the
test.
4.4.5 Adherence of coating. The zinc coated wire shall be capable of being wrapped at a
rate not exceeding 15 turns per minute in close helix of at least 2 turns around a cylindrical
mandrel equal to 2 times the nominal diameter of the wire under tests without cracking or flaking
the zinc coating to such an extent that any zinc can be removed by rubbing with the bare finger.
4.4.6 Ductility of steel. The wire shall be wrapped in a way that does not cause
indenting. The wire shall be wrapped around a cylindrical mandrel for two complete turns in a
close helix at a rate not exceeding 15 turns per minute. The cylindrical mandrel diameter shall
be equal to the nominal wire diameter being tested for composition B and two times the nominal
diameter being tested for composition A.
4.4.7 Weight of zinc coating, composition A. Three specimens not less than 12 inches
long shall be cut from the wire before or after the wire strand is fabricated. These specimens
shall be cut from each size of wire to be used in making each lot of wire strand. The weight of
zinc coating on the specimens shall be determined in accordance with ASTM A 90/A 90M.
4.4.8 Conformance test to preforming of strand. To test strand for conformity to values
shown in table I for increase in diameter, strand shall be mechanically cut with a cutter having
constricting jaws. A plain shear with straight blades distorts the product and may void the test.
After cutting, the wire strand shall be measured by passing the wire strand through a hole drilled
to a diameter increased as shown in table I under "Allowable increase in diameter at cut end" or
by using a shadowgraph with suitable magnification. The allowable increase in diameter shall be
applied to the actual diameter of the wire strand being tested.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When packaging of material is to be performed by
DoD or in-house contractor personnel, these personnel need to contact the responsible packaging
activity to ascertain packaging requirements. Packaging requirements are maintained by the
Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM
products, or by contacting the responsible packaging activity.
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