MIL-DTL-20176G
3.3.3 Reinforcement.
3.3.3.1 Fiber reinforcement. The fiber reinforcement shall consist of ply or plies of braided, knit,
spiraled yarn, or plies of woven fabric.
3.3.3.2 Wire reinforcement (class 1 only). The reinforcing wire shall have the physical and
dimensional properties required to enable the hose to conform to 3.6.3 and 3.6.5.
3.3.4 Hose ends. Unless otherwise specified (see 6.2), the ends shall be fitted with a male and
female coupling as specified in 3.7.1. The coupling shall be secured with clamps specified in
3.7.3. When caps are specified (see 6.2), they will be furnished in accordance with 3.7.2. The cut
ends of wire reinforcement shall be recessed or other adequate means provided to ensure that the
hose will remain free from sharp or projected wires in normal use.
3.4 Dimensional and unit weight properties. Dimensions for and unit weight of hose shall
conform to the requirements of table II when tested as specified in 4.6.2 through 4.6.4.
TABLE II. Dimension and weight properties.
1.50-inch
2.50-inch
4.00-inch
Size id
(38 mm)
(64 mm)
(102 mm)
± 0.047
± 0.062
± 0.062
Tolerance, inch (mm), id
(± 1 mm)
(± 2 mm)
(± 2 mm)
Tube thickness, inch (mm), min
0.094
0.094
0.094
(2 mm)
(2 mm)
(2 mm)
Cover thickness, inch (mm), min
0.078
0.078
0.078
(2 mm)
(2 mm)
(2 mm)
Unit weight, pounds per foot (kg⋅m),
2.5
3.0
1.5
(1 kg⋅m)
(1 kg⋅m)
(1 kg⋅m)
maximum
3.5 Length. Unless otherwise specified (see 6.2), hose shall be 50 feet (ft) (15 240 mm) in
length. Fittings shall be considered additions to hose length, and not part of the length of hose.
Residual length of 47 feet (14 326 mm) remaining after removal of sections for tests (see 4.4.2)
shall be acceptable.
3.5.1 Tolerance. A tolerance of ± 1 percent in length shall be permitted when hoses are
measured as specified in 4.6.1.
3.6 Physical properties.
3.6.1 Dimensional stability. When tested in accordance with 4.6.6, the hose shall not change in
length more than 10 percent nor change in outside diameter (od) more than 18 percent. The twist
shall be not more than 2 degrees per foot while the hose is under the proof pressure. The hose
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