MIL-DTL-15665J
the insignia. Sufficient metal shall be left near any trimmed area to
assure clean smooth trimming without distortion. Unless otherwise
specified on the applicable specification sheet, mock forcers shall not be
permitted. When mock forcers are permitted, the forcer shall be used only
on the areas specified.
3.6.5 Attaching device. Attaching devices shall be as specified on
the applicable specification sheet except for Army enlisted branch of
service and collar insignia which shall have a back plate with prong and
clutch type attaching device as specified on Drawing 4-4-89 (Figure 1).
The back plate shall be fabricated of any type of 1/4 hard brass. As an
alternative, the back plate and prongs may be die cast as specified in
3.6.2; however, the back plate shall be brass plated after copper plating.
When clutches are tested in accordance with 4.5.9.1, it shall not be
possible to remove the clutch from the prong without first depressing the
release wings.
3.6.5.1 Prong (registering). Prongs shall be made from nickel
silver specified in 3.4.1. The prongs shall be of the dimensions shown on
the applicable specification sheet. They shall be positioned and attached
as required by the applicable specification sheet. Registering prongs
shall be an integral part of the insignia when die cast zinc aluminum is
used (see 3.4.3).
3.6.5.2
Prong (integral). When prongs are die cast as integral
part of the insignia and tested in accordance with 4.5.2.1, no evidence of
breaking or cracking shall occur.
3.6.5.3 Screw post type and thumb nut. Screw post and thumb nut
attaching devices shall be made from free cutting brass specified in 3.4.1
and shall conform to the details and dimensions shown on the applicable
specification sheet. The screw post shall be hard soldered or
electronically fused to the back of the insignia in the location shown.
When tested as specified in 4.5.9.2, thumb nuts shall not bind on the
post's threads. Screw post shall be an integral part of insignia when die
cast zinc aluminum is used (see 3.4.3).
3.6.5.4 Prong and clutch type. Unless otherwise specified, prongs
as shown on Drawing B-13-12 (Figure 2) shall be made from nickel silver
specified in 3.4.1, shall be 5/16 inch + 1/64 inch (0.79 cm + 0.04 cm)
long and shall be hard soldered or electronically fused in the locations
specified on the applicable specification sheet. Clutches as shown on
Drawing B-13-12 (Figure 2) shall be made from any type brass. When tested
as specified in 4.5.9.1, it shall not be possible to remove the clutch
from the prong without first depressing the release wings. When prongs
are die cast as an integral part of the insignia and tested in accordance
with 4.5.2.1, no evidence of breaking or cracking shall occur.
3.6.5.5 Back plate with prong and clutch. The back plate with prong
and clutch type attaching device shall conform to the dimensions shown on
Drawing 4-4-89 (Figure 1). The back plate shall be fabricated from any
type 1/4 hard brass. The prongs shall be 5/16 inch + 1/64 inch (0.79 cm +
0.04 cm) long, be made from hard drawn brass and be driven, swaged, hard
soldered or electronically fused in the locations specified in Drawing
4-4-89 (Figure 1). Clutches as shown on Drawing B-13-12 (Figure 2) shall
be made from any type brass. As an alternative, the back plate and prongs
may be die cast as specified in 3.6.2; however, the back plate shall be
brass plated after copper plating. When clutches are tested in accordance
with 4.5.9.1, it shall not be possible to remove the clutch from the prong
without first depressing the release wings.
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