MIL-DTL-13444H
TABLE III. Bend radius (hose assembly installation). 1/
Nominal size
Nominal size
Nominal size
Type I
Type III
I.D.
I.D.
I.D.
inches
inches
fraction
inches
mm
(mm)
(mm)
1/8
.125
3.18
1.75 (44.45)
2/
3/16
.186
4.72
2.00 (50.80)
.75 (19.05)
1/4
.250
6.35
2.25 (57.15)
1.00 (25.40)
5/16
.313
7.95
2.75 (69.85)
1.25 (31.75)
3/8
.375
9.53
3.00 (76.20)
2/
13/32
.406
10.31
2/
1.75 (44.45)
1/2
.500
12.70
3.75 (95.25)
2.25 (31.75)
5/8
.625
15.88
4.75 (120.65)
2.75 (69.85)
3/4
.750
19.05
5.50 (139.70)
2/
7/8
.875
22.23
2/
3.50 (88.90)
1-1/8
1.125
28.58
2/
4.50 (114.30)
1-3/8
1.375
34.93
2/
7.50 (190.50)
1-13/16
1.183
30.05
2/
14.00 (355.60)
1/ Metric equivalents for information only.
2/ Hose type not available in this size.
3.5.7 Fittings.
3.5.7.1 Screw threads. Screw threads of fittings shall be in accordance with ASME B1.1 for the size
specified. Classes of fits for threads shall be in accordance with best commercial practice.
3.5.7.2 Wrench flats. Nominal distance across wrench flats (hexagon or other) shall be in multiples of
1/16 inch (.063 inch) (1.59 mm). Tolerance shall not exceed the tolerance across flats for the semi
finished hexagon nut nearest the fitting wrench flat size, in accordance with ASME B18.2.2.
3.5.7.3 Swivel fittings. Swivel fittings shall swivel freely with hand torque.
3.6 Performance. The following requirements shall be applicable to hose and hose assemblies of
type I and type III except as differentiated herein. The term sample shall hereafter refer to either hoses or
hose assemblies of both types.
3.6.1 Elongation and contraction.
3.6.1.1 Type I. Testing for type I hose and hose assemblies shall be in accordance with 4.7.4. After
being subjected to the applicable working pressure of table IV the test samples shall change no more
than plus or minus 5 percent. For hose assemblies the free length shall be the length between the
fittings.
3.6.1.2 Type III. Testing for type III hose and hose assemblies shall be in accordance with 4.7.4.
After being subjected to the applicable working pressure of table IV, the test sample elongation increase
shall be not greater than 6 percent. For hose assemblies the free length shall be the length between the
fittings.
7
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