(c) Snap fastener installation.
1 General. Installation of a snap fastener may be performed by three different methods. The
most common method is the hand-held method that requires the use of a leather mallet or other no-steel impact device,
a holder to hold the appropriate sized chuck, and an anvil which is used to contain a compatible sized die. A second
method of installing a snap fastener assembly is by use of the hand-operated press, the chuck or die are individually
secured in position by a threaded screw that is tightened by using a suitable sized key (Allen-type hexagon wrench) or a
flat-tip (common-head) screwdriver, as applicable. The third method of snap fastener installation is by use of the foot-
operated press which, except for the means of operation, functions similar to the hand-operated press.
2 Installing a durable or pull-the-dot snap fastener assembly by the hand-held method.
3 Select the appropriate size die and chuck required for installing the fastener cap and socket or
stud and post, as applicable.
4 Place the selected chuck in the open end of the holder and secure the chuck in place using
the locking screw located on one side of the holder. Further place the appropriate die into the anvil.
In most instances a chuck will be installed in the hand held holder and a die will be placed in the
anvil. However, there may be some occasions the require the location of the chuck and die to be
reversed. This situation may also apply to the hand or foot-operated press.
5 Fit the socket or stud, as applicable, on the chuck lower end. Place the cap or post, as
applicable, on the die with the barrel facing up.
6 Position the material over the barrel of the cap or post, as applicable. Insure that the fastener
socket or stud, as applicable, will be located on the proper side of the material for subsequent fastener engagement.
7 Place the socket or stud, as applicable, on the barrel of the cap or post, as applicable. With
an applied strike from a mallet, clinch the two snap fastener components to the material.
8 Remove the clinched snap fastener components from the chuck and die set and check the
seating of the joined components. If the applicable components are not properly seated, repeated the procedure in step
(a) through (f), above.