MIL-DTL-13531J
PIN example: M13531-A3B0964FD000-A indicates, a type III hose, 3/16 diameter, class B (thin cover),
96 ½ inches long, Female 37° flare swivel 90° elbow hose fitting, Female 37° flare swivel straight hose
fitting, 0° displacement angle, steel cadmium plated.
1.2.1 Hose type. The following are the designators for hose types:
A - Type I - Single wire braid reinforced.
B - Type II - Double wire braid reinforced.
C - Type III - Double spiral and single wire braid reinforced.
1.2.2 Hose diameter. Hose inside and outside diameters from table I (one or two digits).
1.2.3 Classes. The classes of hose and hose used for assemblies consist of the following:
Class A - With heavy cover.
Class B - With thin cover.
1.2.4 Length of hose. Length of hose and hose assembly in inches. (Always use 3 digits. Use leading
1.2.5 Fractional length. Fractional length in eighths of an inch (0 through 7).
The following designators are for hose assemblies only.
1.2.6 Fitting type. Fitting types are designated as follows - (Reference SAE J516 and SAE-J518 for
fitting configurations):
A - Male dryseal pipe thread hose fittings.
B - Male straight thread o-ring hose fittings.
C - Male 37° flare straight hose fittings.
D - Female 37° flare swivel straight hose fittings (SWS).
E - Female 37° flare swivel 45° elbow hose fittings (SWE45).
F - Female 37° flare swivel 90° elbow hose fittings short (SWES).
U - Female 37° flare swivel 90° elbow hose fittings medium (SWEM).
V - Female 37° flare swivel 90° elbow hose fittings long (SWEL)
G - Male flareless 24° cone straight hose fittings.
H - Female flareless 24° cone swivel straight hose fittings.
J - 4-bolt split flange straight hose fittings.
K - 4-bolt split flange 22 1/2° elbow hose fittings.
L - 4-bolt split flange 30° elbow hose fittings.
M - 4-bolt split flange 45° elbow hose fittings.
N - 4-bolt split flange 60° elbow hose fittings.
P - 4-bolt split flange 67 1/2° elbow hose fittings.
Q - 4-bolt split flange 90° elbow hose fittings.
R - Female O-ring face seal swivel straight hose fittings (SWSA).
W - Female O-ring face seal swivel straight hose fittings (SWSB).
S - Female O-ring face seal swivel 45° elbow hose fittings (SWE45).
T - Female O-ring face seal swivel 90° elbow hose fittings (SWE).
1.2.7 Displacement angle. Displacement angle: Three digits blank if not required, reference
SAE J517 for orientation of fitting.
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