MIL-DTL-10884H
3.1.2 Steel. Steel sheet, cold-rolled, commercial quality and steel strip, cold-rolled, temper 3,
4 or 5 shall conform to ASTM A109 and A366 respectively. Alloy 260 wire may be used as an
alternate so long as snap performance is unchanged.
3.1.3 Phosphor-bronze spring wire. Phosphor-bronze spring wire shall be round and conform
to copper alloy 510 or ASTM B134 and shall be of the temper shown on applicable drawing.
3.2 Design and construction. The design and construction of the snap fasteners shall be as
specified herein and as shown on the drawings listed in 2.1.2. Where rotation of a part of a snap
fastener component would prevent effective functioning, or assembling to an end use article, that
part of the snap fastener component shall be joined in such a manner that rotation will be
prevented. Snap fasteners shall function as intended, when tested as specified in 4.3.1.
3.2.1 Springs. When the requiring agency has a special application requiring a "soft" or "hard"
action fastener (see 6.2):
a. The dimensions of the inside diameter and gap of the springs, shown on the applicable
drawing, shall not apply.
b. The spring shall be designed to meet the specific application requirement so the socket
assemblies will be firmly engaged when snapped on the appropriate studs and still permit
disengagement or snapping off with a reasonable, properly applied force.
c. The contractor shall, upon request, be required to furnish the dimensions of the inside
diameter and gap of the spring he proposes to furnish.
3.2.2 Threads. All machine screw threads shall conform to the applicable requirements of
FED-STD-H28/2. Self-tapping screw threads shall be in accordance with ASME B18.6.4. Thread
acceptability for machine screws shall be in accordance with FED-STD-H28/20, System 21.
3.2.3 Fastener components. Unless otherwise specified (see 6.2), components necessary for
fasteners shall be furnished and all components shall be of one manufacturer's construction only.
When male or female halves of complete style 1, 1B, 2 and 2A fasteners only are specified,
individual components shall be of one manufacturer's components only. Male components shall
conform to FF-S-107, where applicable.
3.2.3.1 Style 1 and 1B. Style 1 and 1B fasteners shall consist of a female half and a male
half. The female half shall consist of two separate components and the male half shall consist of
one component (or two, if washer is required).
3.2.3.1.1 Female components, style 1 and 1B. The style 1 and 1B fastener components shall
consist of a spring action socket, regular or long pronged when applicable, as specified (see 6.2),
and a clinch plate.
3.2.3.1.2 Male components, style 1. The style 1 male fastener component(s) shall be one of
the following types and sizes, as specified (see 6.2):
a.
Stud, two-screw base.
b.
Stud, eyelet base, with washer.
c.
Stud, machine screw base (No. 8 32UNC 2A). Length as prescribed.
d.
Stud, machine screw base (No. 8 32UNC 2A). large hex. Length as prescribed.
e.
Stud, self-tapping screw base.
f.
Stud, two prong, clinch base with washer.
3.2.3.1.3 Male components, style 1B. The style 1B male components shall consist of a stud,
eyelet base, size 1, with washer, as specified (see 6.2).
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business