MIL-PRF-62410B(AT)
3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled,
recovered, or environmentally preferable materials should be used to the maximum extent
possible, provided that the material meets or exceeds the operational and maintenance
requirements, and promotes economically advantageous life cycle costs.
3.2.2 Tube. The tube shall be a corrosion-resistant material and meet the mechanical
properties as specified in Table I (see 4.7.1 and 4.7.2).
TABLE I. Mechanical properties of tubing.
Nominal outside
Nominal wall
Ultimate tensile
Yield strength
Elongation
diameter
thickness
strength
0.2 percent offset
min (percent)
Full
Strip
inch
(cm)
inch
(cm)
psi
(MPa)
psi
(MPa)
section
0.188 and less
0.016 and less
75,000
(516)
(0.477)
(0.0406)
120,000 max
(827)
---
---
35
---
over 0.016
75,000
(516)
105,000 max
(723)
30,000 min
(207)
35
---
Over 0.188 thru
0.010 and less
75,000
(516)
0.500
(0.0254)
115,000 max
(792)
---
---
35
---
(0.477 thru
over 0.010
75,000
(516)
1.27)
105,000 max
(723)
30,000 min
(207)
35
---
Over 0.500
All
75,000
(516)
(1.27)
100,000 max
(689)
30,000 min
(207)
35
30
3.2.3 Fitting. The fitting shall be of a corrosion-resistant material (see 4.7.1 and 4.7.2).
3.3 Design.
3.3.1 Fitting and tube assembly. The fitting and tube assembly dimensions shall be as
specified (see 6.2). The fitting configuration shall be in accordance with Figure 2 (see 4.7.2 and
4.7.5).
3.3.2 Fitting attachment. The fitting and the tube shall form a leak proof joint. If
swaging is performed, it is recommended that the fittings be swaged on the tube by applying
5500 pounds per square inch (psi) (38 Megapascals (MPa)) hydrostatic pressure on swaging dies
(see 4.7.2 and 4.7.6).
3.3.3 Tube insertion length. Before attachment, the length of the tube to be inserted into
the fitting shall be in accordance with Table II (see 4.7.2 and 4.7.7).
3.3.4 Tube bend radii. Unless otherwise specified on the detailed part drawing, all tube
bends shall be in accordance with SAE AS33611 (see 4.7.2 and 4.7.8).
3.3.5 Nut. The nut on the separable fitting shall have the same thread and hex size for
corresponding tube sizes in accordance with SAE J514 and shall mate with fittings specified in
SAE AS33514. The nut shall be captive and swivel freely on the assembly (see 4.7.2 and 4.7.9).
3
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