MIL-PRF-28523C
2.4 Order of precedence. In the event of a conflict between the text of this document and the
references cited herein, the text of this document will take precedence. Nothing in this document,
however, supersedes applicable laws and regulations unless a specific exemption has been
obtained.
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in
accordance with 4.2.
3.2 Materials. Materials used shall be free from defects which would adversely affect the
performance or maintainability of individual components or of the overall assembly. Materials not
specified herein shall be of the same quality used for the intended purpose in commercial practice.
Unless otherwise specified herein, all equipment, material, and articles incorporated in the work
covered by this specification are to be new and fabricated using materials produced from
recovered materials to the maximum extent possible without jeopardizing the intended use. The
term "recovered materials" means materials which have been collected or recovered from solid
waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials.
Unless otherwise specified, none of the above shall be interpreted to mean that the use of used or
rebuilt products is allowed under this specification.
3.2.1 Inner tube. The rubber compound used for the inner tube shall be resistant to water and oil.
The inner tube shall have a smooth bore, free of pitting, dirt, and mandrel lubricants. Thickness
shall be not less than 0.093 inches (2 millimetre (mm)).
3.2.2 Reinforcement. The reinforcement shall consist of sufficient plies to meet the requirements
of this specification and be suitable for the purpose intended. Where used, the layers of
reinforcement shall be free from mechanical defects and shall be applied on a bias of 45 degrees
with edges lapped not less than 0.50-inch (13 mm).
3.2.3 Cover. The cover shall consist of an oil-, ozone-, and abrasion-resistant compound to meet
the requirements of this specification.
3.3 Construction. Hose assemblies shall consist of tube, reinforcement, and cover as described in
3.2.1, 3.2.2, and 3.2.3 with the reinforcement plies suitably impregnated with rubber to achieve a
continuous rubber band from the tube through the reinforcement to the outer cover. Hose
assemblies shall be fitted with swivel connections as described in 3.4.
3.4 Hose end fittings. The ends of the hose shall be fitted with interlocking type female
couplings, as specified in contract or order (see 6.2). Couplings shall be a quick release type.
The wing nut shall have NH hose threads to hold the steel adapter spud against the ground seat.
The spud shall have internal NPT threads on one end and external NH threads with a mating
ground joint seat on the other end.
A 4-bolt clamp with four fingers shall be used to hold the shank to the hose. Threads shall be in
accordance with FED-STD-H28.
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