A-A-55202A
acceleration specified in NFPA-1972 or if cracking or fracturing of the helmet occurs. (In the
event of a dispute as to whether the helmet shell is cracked or fractured the helmet shell shall
be subjected to and pass the electrical insulation test). A different helmet shall be used for
impact resistance testing for each of the four exposure conditions. The headband shall be
adjusted to obtain a snug fit with the head form. If the helmet design includes crown straps,
the straps shall be properly adjusted to obtain contact with the top of the head form.
2.2.5 Ear and neck flap. The ear and neck flap shall be removable. The exterior color shall
approximate the color of the helmet shell. Other colors may be used with the approval of the
procurement activity/contracting officer.
2.2.6 Face shield. The helmet shall be furnished with a clear transparent face shield. It shall
be attached to the helmet in such a manner that it can be pivoted and secured, in any position
up or down. The face shield shall meet the performance requirements specified for
Faceshields in American National Standards Institute (ANSI) Standard Z87.1 - Practice for
Occupational and Educational Eye and Face Protection.
2.2.7 Weight. The weight of the helmet, excluding the face shield, ear and neck flap, and the
optional shell edge trim, shall not exceed 35 ounces when weighed on a balance or scale
graduated to within not more than 1/4 ounce (10g.). The weight of the complete helmet shall
not exceed 42 ounces.
2.2.8 Fasteners and adjusting mechanisms. Fasteners and adjusting mechanisms used in the
helmet suspension system shall be capable of operation or adjustment, as applicable, a
minimum of one hundred times without any deterioration of effectiveness.
2.2.9 Physical requirements. The finished helmet shall conform to the requirements indicated
in Table I.
Table I. - Physical requirements
Characteristic
Requirement Test Method
Retention system
NFPA-1972
Durability of fasteners and adjusting mechanisms
1/ 2/
Water absorption
0.1 percent
NFPA-1972 3/
Flame resistance of helmet shell and face shield
NFPA-1972, ANSI Z87.1
Penetration resistance
NFPA-1972 5/ 6/
Heat resistance
NFPA-1972
Electrical insulation
NFPA-1972
Flame resistance of ear and neck flap
NFPA-1972 4/
1/ For each sample unit a determination shall be made for each fastener or adjusting
mechanism of the helmet suspension assembly.
2/ Each fastener or adjusting mechanism of the helmet suspension assembly shall be opened
and closed or secured and unsecured, as applicable, ten times. Any fastener or adjusting
mechanism that indicates any evidence of deterioration of effectiveness by the tenth cycle
shall constitute a failure.
3/ The helmet shell assembly consisting of the helmet shell and energy absorbing lining shall
meet the water absorption requirement specified for helmets conforming to NFPA-1972.
4/ The ear and neck flap shall meet the flame resistance requirement specified in NFPA-1972
for ear covers.
5/ A different helmet shall be used for penetration resistance testing for each of the four
exposure conditions.
3
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business