MIL-DTL-17902G(SH)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between
the text of this document and the references cited herein, the text of this document takes 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 (see 6.3) in
accordance with 4.2.
3.2 Material. Material shall be new and unused. The hose shall have been manufactured not more than
12-18 months prior to date of delivery.
3.2.1 Tube. The tube shall be made of a rubber compounded for resistance to deterioration by aromatic and jet
fuels and shall contain no phosphate plasticizers.
3.2.2 Cover. The cover shall be made of a rubber compounded for resistance to deterioration caused by
atmospheric oxygen and ozone, sunlight, abrasion, and fuels. The cover shall be designed to withstand exposure and
durability to rubbing against shipboard flight deck non-skid materials as specified in MIL-PRF-24667.
3.2.3 Reinforcement. The reinforcement may be of nylon, polyester, or high tenacity rayon that shall meet the
requirements of this specification.
3.2.3.1 Wire helix (type NCA/NCH hose). The wire in the helix shall be heavily galvanized or copper plated
steel with a diameter of not less than 0.035 inch. The cross-sectional area of wire per linear inch shall be determined
based on the adaptability of the hose to cognizant fittings and successful completion of all testing parameters. The
tensile strength of the wire shall be not less than 200,000 pounds per square inch (psi) (see 4.5.9.1). The wire shall
show no defects in the steel (see 4.5.9.2). Flaking or peeling of the galvanized or copper coating on the wire shall
not be considered a defect.
3.2.4 Friction or filler. The friction or filler used to impregnate the reinforcement shall be made of a rubber
compounded for resistance to deterioration by aromatic and jet fuels.
3.2.5 Couplings and fittings. The materials for the couplings and contact assembly shall be as specified in
table V.
TABLE V. Materials for couplings and contact assembly.
Name of part 1/
Part no.
Material
Applicable document
1
Contract button
Brass
ASTM B16/B16M
2
Spring
CRES
ASTM A313/A313M, Type
302
3
Front nut
Brass
ASTM B16/B16M
4
Spider
Molded nylon
ASTM D6779
5
Contact rod
Brass
ASTM B16/B16M
6
Washer
Brass
ASTM B121/B121M
7
Contact rod guide
Brass
ASTM B453/B453M
8
Lead washer
Virgin lead
ASTM B129
9
Double securing nut
Brass
ASTM B16/B16M
10
Cable connector bolt
Brass
ASTM B16/B16M
11
Coupling body, male
Brass, forging
ASTM B283/B283M
UNS C37700
12
Coupling sleeve
Brass, pressure die casting
ASTM B176
UNS C87900
4
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