MIL-DTL-8794F
NOTES:
1. Dimensions are in inches
2. Metric equivalents are given for information only.
3. C diameter indicates maximum permissible bulge of inner synthetic rubber tube when hose is
assembled with adapters.
FIGURE 1. Hose construction - Continued.
3.4.2 Concentricity.
3.4.2.1 Concentricity (hose sizes -3 through -8). The outer surface of the hose shall be concentric
with the inside bore of the synthetic rubber tube within .020 inch (0.05 mm) total indicator reading. The
variation in concentricity between the inside bore of the synthetic rubber tube and the OD of the
reinforcing material shall not exceed these same values.
3.4.2.2 Concentricity (hose sizes -10 through -48). The outer surface of the hose shall be concentric
with the inside bore of the synthetic rubber tube within .030 inch (0.08 mm) total indicator reading. The
variation in concentricity between the inside bore of the synthetic rubber tube and the OD of the
reinforcing material shall not exceed these same values.
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.
3.5 Performance.
3.5.1 Materials performance.
3.5.1.1 Tensile strength and elongation of rubber. When tested as specified in 4.8.2, the tensile
strength shall be a minimum of 2200 psi (16.17 MPa) and the elongation shall be a minimum of 200%.
3.5.1.2 Adhesion (hose size -12 through -48). When tested as specified in 4.8.3, strip specimens
shall be tested for adhesion between the inner tube and inner cotton braid, and inner cotton braid and
wire braid. The synthetic rubber tube and the inner layer of reinforcing material, and between layers of
reinforcing material, shall be at least 10 pounds per inch, and 5 pounds per inch for an oil aged sample.
3.5.2 Synthetic rubber tube performance.
3.5.2.1 Water and alcohol resistance. After exposure to a mix of water and alcohol as specified in
4.8.4, the synthetic rubber tube tensile strength shall not exceed 35 percent, based on the original cross-
sectional area of the synthetic rubber tube, see 3.5.1.1.
3.5.2.2 Fuel resistance. After exposure to fuel, the tensile strength of the synthetic rubber tube shall
not be less than 1,000 psi (69 bar) when tested as specified in 4.8.5, the elongation shall be not less than
100 percent, and the volume increase shall not exceed 30 percent for hose sizes -12 and smaller, and
shall not exceed 60 percent for hose sizes greater than size -12.
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