MIL-DTL-28693A
3.4.2 Properties of rubber components (tube, friction rubber, and cover). Rubber used in the hose
construction shall be in accordance with requirements listed in table I, when tested as specified in 4.7.9.
3.4.2.1 Initial tensile properties. When tested in 4.7.9.1 hose samples shall meet the requirements
in table I.
3.4.2.2 Tensile properties after immersion. When tested in 4.7.9.2 hose samples shall meet the
requirements in table I.
3.4.2.3 Tensile properties after oven aging. When tested in 4.7.9.3 hose samples shall meet the
requirements in table I.
3.4.2.4 Volume change after immersion. Tube, cover, and friction rubber when tested in 4.7.9.4
shall meet the requirements in table I.
3.4.2.5 Initial adhesion. The adhesion of tube to cover when tested in 4.7.9.5 shall meet the
requirements in table I.
3.4.2.6 Adhesion after immersion. The adhesion of tube to cover when tested in 4.7.9.6 shall meet
the requirements in table I.
3.4.2.7 Nonvolatile extractable material. A tube sample when tested in 4.7.9.7 shall meet the
requirements in table I.
3.4.2.8 Phosphate plasticizer test. A tube sample when tested in 4.7.9.8 shall meet the
requirements in table I.
3.4.2.9 Resistance to ozone. A cover sample when tested in 4.7.9.9 shall meet the requirements in
table I.
3.4.2.9.1 Hazardous substances and ozone depleting chemicals. The ozone resistance test (see
4.7.9.9) may contain hazardous chemicals. It shall be handled in accordance with Federal regulations
and guidelines to perform those tests. For further information about toxic chemicals and hazardous
materials list, consult the Environmental Protection Agency web database at
3.4.2.10 Low temperature bend test. A tube and cover sample when tested in 4.7.9.10 hose
samples shall meet the requirements in table I.
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