Testing. Cords requiring testing shall be
tested when facilities are available. When facilities are
not available, return cords to depot for testing.
Elongation testing should be accomplished in the
Test bungee or endless ring type
cord as a complete unit using suitable jigs or spools and
test load specified in table 9-7.
Jigs or spools for stretching shock
absorber cords should be smooth and not less than 1
1/2 inches in diameter to prevent damaging cords during
exerciser cords for testing by marking 6-inch gauge
lengths on one side of cord. Use soft lead pencil for
Mark bungee cords with 6-inch
gauge marks penciled on opposite sides of ring.
Attach cord to be tested to suitable
jigs or spools. Apply specified test pressure slowly
After test load has been applied,
remove cord from rig and measure between gauge
Reject cords which elongate more
than 100 percent during test
Reject cords which have gauge
marks more than 6 1/4 inches apart 10 minutes after
pressure is released.
After testing, fill in and attach an
Acceptable or Serviceable Tag (DD Form 1574) to cord
with a note:
To be reinspected and retested 6
months from date hereon.
Fabrication Requirements. Elastic shock cord
used for fabrication of assemblies shall not be over 20
quarters (5 years)old from date of manufacture. Date of
manufacture of elastic shock cord shall be determined
from table 9-8 Date of manufacture is indicated by
colored threads in the cotton braid. The first two colored
threads indicate the year of manufacture and the third
colored thread indicates the quarter Replace cord using
the following procedures'
Cut the elastic shock cord square with a
knife or other sharp cutting tool.
Table 9-7. Test Loads
Endless ring bungee