MIL-DTL-8788F
D
Reinforcing braid
Wire braiding OD
Hose size
number of
dash number
wire layers
Inch
mm
.484 ± 0.016
-4
12.29 ±0.41
2
.547 ± 0.016
-5
13.89 ±0.41
2
.640 ± 0.023
-6
16.26 ±0.58
2
.734 ± 0.023
-8
18.64 ±0.58
2
.859 ± 0.031
-10
21.82 ±0.79
2
1.047 ± 0.031
-12
26.59 ±0.79
2
1.328 ± 0.031
-16
33.71 ±0.79
3
NOTES
1. Dimensions are in inches.
2. Metric equivalents are for information only.
3. Dimension C indicates both the minimum allowable inner tube diameter at the bulge and the
minimum nipple ID of the fitting when assembled with the hose. When elbow fittings are used, the
minimum ID through the elbow bend area may be .031 inch (0.79 mm) less than the values shown
in this column.
FIGURE 1. Construction of hose - Continued.
3.3.1 Inner tube. The inner tube shall be a seamless fabrication of an oil-resistant elastomer and shall
have a uniform thickness. The bore of the tube shall be smooth, free from pitting, cuttings, borings, or
cements.
3.3.2 Reinforcement. The hose shall be reinforced with uniformly braided steel wires.
3.3.3 Cover. The cover shall be of a compounded polymerized chloroprene that is both abrasion and
oil resistant. A friction ply or a braided layer may be used over the wire reinforcement.
3.4 Dimensions.
3.4.1 Outer surface concentricity. The outer surface shall be concentric, with the inside bore of the
tube, to within .035 inch (0.89 mm) full indicator movement (FIM) for sizes 6 and smaller, .040 inch (1.02
mm) FIM for sizes 8 and 10, and .050 inch (1.27 mm) FIM for sizes 12 and 16.
3.4.2 Inside bore concentricity. The reinforcement shall be concentric, with the inside bore of the
tube, to within .030 inch (0.76 mm) FIM for hose size 8 and smaller. Hoses size 8 and larger shall be
within .035 inch (0.89 mm) FIM.
3.4.3 Length of bulk hose.
3.4.3.1 B designator of bulk hose lengths. Bulk hose shall be furnished in lengths greater than 20 feet
(6.10 m). However, up to 10% of the order may be furnished in random lengths between 10 and 20 feet
(3.05 to 6.10 m). No more than 10% of the order shall be furnished in random lengths between 3 and 10
feet (0.91 to 3.05 m).
3.4.3.2 S designator for specific bulk hose lengths. When the order is for a specific length in feet, a
tolerance of ±1% of the required length shall be used.
6
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