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MIL-V-25023P
Identification Marking of US Military Property
MIL-STD-130
Specifications and Standards, Order of Precedence
MIL-STD-l&3
Packing of
Wire, Lock
MS20995
Valve, Fuel Drain - Self-Locking, Flush Type,
MS27262
Installation of
Packing "O" Ring Hydrocarbon Fuel Resistant
MS29513
Valve-Fuel Drain, Self-Locking, Poppet
MS29528
Valve-Fuel Drain, Self-Locking, Tank Mounted
MS29529
Valve-Fuel Drain, Self-Locking, Line Mounted
MS29530
Valve, Fuel Drain - Self-Locking, Flush Type
MS29571
Safety Wiring, General Practices for
MS33 540
Metals, Definition of Dissimilar
MS33586
MS33588
Nuts, Self-Locking, Aircraft, Design and Usage,
Limitations of
PUBLICATIONS
Air Force-Navy Aeronautical Bulletin
Age Controls for Synthetic Rubber Parts
No. 438
(Copies of specifications, standards, drawings, and publications required
by suppliers in connection with specific procurement functions should be ob-
tained from the procuring activity or as directed by the contracting officer.)
REQUIREMENTS
3.
3.1  Qualification.- The drain valves furnished under this specification shall
be a product which has been subjected to and which has passed the qualification
tests specified herein, and has been listed on or approved for listing on the
applicable Qualified Products List.
3.2 Materials.- Materials and processes used by the manufacturer of fuel
drain valves shall be suitable for the purpose, and shall conform to applicable
Government specifications.  Materials conforming to contractors specifications
may be used provided the specifications are released by the Services and con-
tain provision for adequate tests.  The use of contractor's specifications will
not constitute waiver of Government inspection,  To assure satisfactory opera-
tion as herein defined, all materials used in the valve shall be sufficiently
resistant to the fuels and fluids conforming to MIL-J-5161, MIL-G-5572, MIL-T-5624,
and TT-S-735, having an aromatic content from 0 to 30 percent.
3.2.1 Metals.- All metals used in the construction of fuel drain valves
shall be of a corrosion-resistant type or shall be suitably protected to resist
corrosion during the normal service life of the valve.  The use of dissimilar
metals shall be avoided where practicable, or used in accordance with MS33586.
The use of magnesium or any alloy thereof is prohibited.
3.2.2 Casting.- Castings shall be clean, sound, and free from blowholes,
porosity, cracks, and any other defects.
2

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