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of these items. [Figures 3-84 through 3-88]
Figure 3-84. Fastener tape, hook and pile, nylon
(Velcro®).
Specification: PIA-F-21840
Strength: Varies according to use and type
Identification: Different widths from 5/8" to 3", 1"
most common
Common use: Closure flaps, bridles, toggles
Comment: An extremely versatile fastener
material.
3-24
Figure 3-85. DOT Fasteners, Durable.
Specification: PIA-F-10884
Strength: N/A
Identification: N/A
Common use: General purpose snap
Comment: Open when pulled from any direction.
Figure 3-86. DOT Fasteners, Pull-the-dot.
Specification: PIA-F-10884
Strength: N/A
Identification: Button marked with “pull-the-dot”
markings
Common use: Military container closure flaps
Comment: Open only when pulled from one
particular side.
Figure 3-87. Grommets.
Specification: MIL-G-16491
Strength: N/A
Identification: As marked
Common use: Container closure systems, 3-ring risers,
deployment bags
Comment: Rolled rim spur grommets are the
most common grommets used in
modern parachute systems.
Figure 3-88. Interlocking slide fasteners (zippers).
Specification: V-F-106, AN229
Strength: N/A
Identification: N/A
Common use: Some military containers, carry bags,
jumpsuits
Comment: Most modern zippers are nylon vs.
metal. Nylon comes in rolls and can
be cut to fit.
3-25
HOUSINGS
Housings are spiral-wound flexible tubing. Almost all are
stainless steel. Their design is to route, house, and protect
the ripcord cable. They are anchored at the container end
and at the ripcord pocket or mount at the other end. Most
housings are compressible only, but some military housings
used with seat parachutes are expandable as well.
With the advent of modern sport systems, smaller diameter
housing for ripcords is more common. In addition, the
3-ring release system has introduced an even smaller
housing for use with the coated release cables. Housings
are measured under slight tension. [Figures 3-89A
through 3-89C]
Figure 3-89A. Housing, flexible, ripcord.
Specification: PIA-H-7750
Strength: N/A
Identification: ID approximately .375"
Common use: Military parachute assemblies
Comment: N/A
Figure 3-89B. Housing, flexible, ripcord.
Specification: Commercial
Strength: N/A
Identification: ID approximately .26"
Common use: Most modern sport systems
Comment: Brass or steel ferrules.
Figure 3-89C. Housing, flexible, 3-ring.
Specification: Commercial
Strength: N/A
Identification: .18" ID
Common use: 3-ring release systems
Comment: Brass ferrules.
3-26
RIPCORDS, CABLES, AND SWAGES
The standard ripcord used today on most parachute systems
consists of a metal handle, stainless steel cable, a
terminal ball, and one or more pins swaged onto the cable.
The handles come in various shapes and sizes. The terminal
ball may be of several configurations such as a ball
and shank design. The pins usually are one of two basic
designs, either the elbow pin or the terminal pin. This
basic configuration is used primarily on reserve and emergency
parachute systems. Main ripcords may also consist
of plastic handles and nylon coated cable without pins.
On modern sport parachutes, the hand deploy pilot chute
replaced the conventional ripcord, by either throw-out or
pull-out. These configurations use the curved or straight
locking pins attached to the pilot chute bridle. [Figures
3-90 through 3-96]
Figure 3-90. Handle, steel, ripcord.
Specification: MS70106
Strength: N/A
Identification: As marked
Common use: Ripcord assemblies
Comment: A. Modern trapezoidal.
B. Martin Baker.
C. Helwedge.
D. Cloverleaf.
Figure 3-91. A. Pin, ripcord, terminal; B. Pin, ripcord,
elbow.
Specification: A. 55A6480
B. MS70107
Strength: N/A
Identification: N/A
Common use: Ripcords
Comment: N/A
Figure 3-92. A. Ball, terminal; B. Ball and shank.
Specification: A. MS70093; B. MS20664
Strength: A. 736 lb
B. 920 lb
Identification: N/A
Common use: Ripcords
Comment: N/A
3-27
Figure 3-93. 7x7 S/S cable.
Specification: MIL-W-5424
Strength: 920 lb
Identification: N/A
Common use: Ripcord cable
Comment: N/A
Figure 3-94A. Static line cable.
Specification: 3/32" 7x7 galvanized, nylon coated to
5/32"
Strength: N/A
Identification: Translucent
Common use: Main static line flex-pin, tandem
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Parachute Rigger Handbook(33)
