MIL-DTL-38726B
4.7.5 Low temperature flexibility. The low temperature flexibility test shall be determined in
accordance with the low temperature test described in ASTM D380 (see 4.7.2). Requirements shall be
as specified in 3.6.4.
4.7.6 Over-tightening torque. Two adapter assemblies of each size shall be tested in accordance
with SAE-ARP908.
4.7.7 Verification of fitting plating thickness for aluminum-nickel, cadmium, or zinc (see 3.5.1).
Verification of under plating and finish plating shall be measured in accordance with ASTM B499,
ASTM B567, or ASTM B568. A cross-sectioning method, such as that specified by ASTM B487 or
ASTM B748, can also be used as a referee method to confirm the precision when thicknesses of 30
microinches (0.76 µm) or above are used. The zinc plating thickness may also be measured in
accordance with ASTM B633 or ASTM B695 as applicable. The plating requirements shall meet the
requirements of 3.5.1. The following details shall apply:
a. When applicable a minimum of three points shall be measured on the fitting surface. The fitting
may be rotated, but measurement points shall be progressively further from the last point.
b. Readings shall not be averaged. Measurements shall be as follows:
(1) One measurement shall be taken at a point on the front and rear.
(2) Three measurements shall be taken in the middle areas.
4.7.8 Salt spray test (see 3.7.7). Fittings when subjected to salt spray testing shall meet the
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD or in-house
contractor personnel, these personnel need to contact the responsible packaging activity to ascertain
packaging requirements. Packaging requirements are maintained by the Inventory Control Point
packaging activities within the Military Service or Defense Agency, or within the military service's system
command. Packaging data retrieval is available from the managing Military Service or Defense Agency's
automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
6.1 Intended use. The adapter assembly covered by this specification is intended for use with low-
pressure hose assemblies used on air and vacuum systems for instruments, gages, and automatic pilots.
The adapter assembly is a military-unique item because it is compatible with associated components and
equipment in military aircraft and is capable of operating at temperatures ranging from -65 °F to +160 °F
(-95°C to +320°C).
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification.
b. PIN (see 1.2).
c. Packaging requirements (see 5.1).
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