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|  MIL-H-46354A(MU)
STANDARDS
Federal
Colors, Requirements for
FED-STD-595
Rubber Sampling and Testing
FED-STD-601
Military
Sampling Procedures and Tables for
MIL-STD-105
Inspection by Attributes
Quality Assurance Terms and Definitions
MIL-STD-109
Visual Inspection Guide for Rubber Sheet
MIL-STD-289
Material
Visual Inspection Guide for Cellular
MIL-STD-293
Rubber Items
Rubber Composition Vulcanized General
MIL-STD-417
Purpose, solid (Symbols and tests)
(Copies of specifications, standards, drawings and publications required by
suppliers in connection with specific procurement functions should be obtained
from the processing activity or as directed by the contracting officer.)
3. REQUIREMENTS
3.1 Qualification. - Headrests furnished under this specification shall
be products which are qualified for listing on the applicable qualified pro-
ducts list at the time for opening of bids (see 4.2 and 6.2).
3.2 Materials. - Materials shall be as specified on the applicable draw-
ing. Choice of elastomeric materials shall be at the option of the manufac-
turer except that natural rubber shall not be used for portions of the assem-
bly exposed directly to the atmosphere.
3.3 Construction. - The headrests shall be either Type I or Type II,
constructed to the form and dimensions specified on the drawing (see 6.1).
3.3.1 Type I. - Type I headrests shall consist of a cellular elastomeric
pad molded through and around a perforated mounting bracket and coated with a
minimum 0.02 inch thick elastomeric skin.
3.3.2 Type II. - Type II Headrests shall consist of a molded cellular
elastomeric pad adhered to a steel plate and the entire assembly coated with
a minimum 0.02 inch thick elastomeric skin.
3.3.3 Metal components. - Shall be in accordance with the. applicable
drawings and Specification MIL-F-45133.
3.4 Flexibility. - The flexibility of the pad in terms of unit pressure
required to produce a compression-deflection equal to 25 percent of the thick-
ness of the pad, shall be 7 3 pounds per square inch (psi) at room tempera-
ture, 70F 8F.
2
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