TM 1-1500-204-23-1
Table 9-9. Minimum Serving Length
Elastic cord diameter
Serving length
(Inches)
(Inches)
1/4
1 1/2
3/8
2
1/2
2 1/2
5/8
3
¾
4
1
4
c.
Identification. Colored threads in the outer
cover are used to indicate date of manufacture. The
color code for threads is given in table 9-8. Bungee and
shock absorber cords have two threads to indicate year
and one to indicate quarter. Elastic exerciser cords
have three threads to indicate year and one for quarter.
Elastic shock cord, used in some compass mounts, is
covered with a solid black braid with no colored thread
to indicate date of manufacture. Although these cords
do not have a limited shelf life, they must pass the
elongation test before installation.
d.
Fabrication Procedures. Fabricate elastic
shock cord assemblies using the following procedures.
(1)
Cut elastic shock cord a minimum of 4
inches longer than required finished assembly length.
(2)
Wrap ends of cut elastic shock cord with
masking tape to prevent raveling of cotton braid.
(3)
Center mark required finished assembly
length on elastic shock cord as shown in figure 9-43.
Figure 9-43. Marking Elastic Shock Cord
(4)
Measure back from each end of marked
finished assembly length a distance equal to lockring
dimension specified in table 9-10, and mark this
dimension.
Table 9-10. Lockring Locating Dimensions
Cord size
3/8 Inch
1/2 Inch
5/8 Inch
Lockrlng
Locating dim
1.5 Inch
2.0 inch
2.25 inches
(5)
Install end fittings back to back on elastic
shock cord.
(6)
Clamp elastic shock cord in a stretch
fixture in such a manner that markings for finished
assembly
length
and
lockring
locations
are
approximately equal distances between stretch fixture
jaws.
(7)
Stretch elastic shock cord until distance
between cord markings has increased 50 percent.
(8)
Crimp lockrings on cord at marked
locations. Crimp each ring until ring ends are in contact
with each other.
(9)
Remove elastic shock cord from stretch
fixture and cut elastic shock cord approximately 3/4 inch
beyond lockrings.
NOTE
After cutting elastic shock cord, ends
will shrink approximately 1/4 inch.
(10)
Dip or brush cut ends of elastic shock
cord with a coat of sealant, MIL-S-4383, and allow to air-
dry. Coating should be heavy enough to prevent
raveling of cotton braid.
(11)
Reinstall assembly in stretch fixture, and
pull until finished assembly length has increased 50
percent. Ensure that there is no slippage of lockrings or
end fittings.
9-63
