MIL-PRF-62410B(AT)
THREADS MUST BE COMPATIBLE WITH FITTING ENDS PER
SAE-AS33514 OR EQUIVALENT.
FIGURE 2. Separable fitting.
4.7.7 Tube insertion length. To determine conformance to 3.3.3, inspection shall be
performed using the tube insertion tool (gage) (see 4.7.4b) to verify the tube insertion length into
the fitting (see Figure 2) is as specified for the applicable tube size in Table II.
4.7.8 Tube bend radii. To determine conformance to 3.3.4, the tube assembly bend radii
shall be inspected for conformance to requirements of SAE AS33611 unless otherwise specified
on the detailed part drawing.
4.7.9 Nut. To determine conformance to 3.3.5, the nut shall be checked for thread size
with an appropriate go/no go thread plug gage and a functional mating performed with the
applicable fitting (see SAE AS33514). The connecting nuts of the assembly shall be examined
for being captive yet have the ability to swivel freely.
4.7.10 Leakage. To determine conformance to 3.4.1.1, connect the tube assembly to a
pressure supply unit (see 4.7.4.c). Utilizing an appropriately sized fitting (see SAE AS33514),
tighten the connecting nuts. Fill the tube assembly with test fluid and cap the open end after all
air is removed. Pressurize slowly from 0 psig to 1650 psig (0 MPa to 11.37 MPa) while
monitoring the assembly from behind a protective enclosure. There shall be no evidence of
external leakage or permanent deformation.
4.7.11 Proof pressure. To determine conformance to 3.4.2, connect the tube assembly to
a pressure supply unit (see 4.7.4c), then tighten connecting nuts of the assembly. Fill the tube
assembly with test fluid and cap the open end after all air is removed. Pressurize at one-third of
rated pressure increase per minute until 3000 psig (20.7 MPa) proof pressure is attained. This
pressure shall be maintained for a 5 minute period while monitoring the assembly from behind a
protective enclosure. There shall be no evidence of external leakage or permanent deformation.
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