MIL-DTL-43415D
3.2.9.1 Top ply. The top ply shall be a vinyl film conforming to the requirements of
3.2.7.1.
3.2.9.2 Bottom ply. The bottom ply shall be a plumper paper conforming to the requirements of
3.2.7.2. In addition, the plumper paper shall be colored black with a colorfast dye and shall not bleed
or transfer (see 4.3.2).
3.2.9.3 Rivet, split. The rivet for attaching one of the loops to the strap shall be a strip rivet,
approximately 3/16 inch long legs and 1/8 to 3/16 inch diameter, black enameled hand (see 4.3.2).
3.2.9.4 Construction. The chin strap shall conform to the design and dimensions as shown in Figure
3. The polished side of the vinyl film shall be towards the top of the chin strap. The top strap shall be
riveted to the top of loop and the button strap shall be stapled to bottom fold of loop when joining
ends of loop (see 4.3.2).
3.2.10 Elastic ornamental braid (Class 1 only). The braid shall be a two-color, rayon-elastic,
reversible braid conforming to the following requirements and when tested as specified in 4.3.2.
Characteristic
Requirement
Lines
6
Number of carriers
24
Ends per carrier
2
Warp (30-gage rubber)
10
Picks per inch (relaxed, minimum)
68
Pounds per gross yard (minimum)
2.5
Overall width (inches)
15/32 + 1/32
One-half of the braid shall be Green, and the other half Yellow. The finished braid shall show a "good
(rating 3-4)" fastness to light and laundering.
3.2.11 Buttons. The buttons for affixing the chin strap shall be metal, cap, screw-back,
25-line, conforming to Type II of MIL-B-3461. The buttons for the Class 1 cap shall conform to Style
2, Class A, and the buttons for the Class 2 cap shall conform to Style 1.
3.2.12 Eyelets. The eyelets and washers shall be brass, conforming to NASM20652. The
side eyelets shall conform to Dash No. BBE 110; the front eyelet to Dash No. BBE 118. The washer
for the front eyelet shall conform to BBW 101 of NASM20652/1. The four side eyelets may be tacked
with washers.
3.2.13 Sweatband reinforcement strip. The reinforcement piece shall be a strip of cotton print cloth
or cotton sheeting cloth.
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