MIL-DTL-50713B
3. REQUIREMENTS
3.1 Materials. All materials used in the manufacture of the thrusters shall conform to the specifications
referred to on the respective drawings unless specific approval in writing covering a departure therefrom has
been obtained from the cognizant Navy design activity prior to manufacture. When alternate materials or
methods of manufacture are specified on the drawings, the bidder's selections shall be clearly stated in the
proposal. The remanufactured thruster metal parts assembly shall contain a new shear pin, new O-rings, new
piston locking spring, new cap screws, and a new ring.
3.2 Hydrostatic pressure. The body and head shall withstand a hydrostatic pressure of 8,000 pounds
per square inch (psi) for 15 seconds, minimum, without leaking, deformation, or mechanical failure (see
6.3.1).
3.3 Structural strength. The assembled thruster shall withstand a static tensile force of 2,000 pounds,
minimum, for 15 seconds, minimum, between mounting points without unlocking and without mechanical
failure (see 6.3.1).
3.4 Protective finish. Protective finish shall be in accordance with the applicable specifications and
drawings and shall apply to all surfaces of the component regardless of configuration. Remanufactured
exterior components (see 6.4 and 6.5) shall have the existing protective finish stripped and the specified
protective finish reapplied.
3.5 Residual magnetism. The metal parts assembly shall not deflect the indicator of the compass more
than five degrees in either direction using the procedures of 4.5.4.
3.6 Shear pin strength. The shear pin, after application of protective finish, shall shear when a load of
48 ± 4 pounds is applied at the steady rate of 0.125 inch per minute.
3.7 Metal parts assembly. Parts shall be combined to produce an assembly which conforms to the
requirements of the metal parts assembly drawing. All threaded joints shall be assembled with sufficient
torque to bottom components.
3.7.1 Integrated plant products. When remanufacturing and loading of the assembly is performed in
an integrated plant, the metal parts assembly requirement may be waived and the residual magnetism
requirement performed on the loaded assembly only.
3.7.2 Threaded component parts. Class 2A or 2B thread gage shall be used on remanufactured
component parts inspection versus class 3A or 3B thread gage required on new hardware for thrusters.
3.8 Workmanship. Thrusters shall be free of cracks, splits, or other defects which might prevent
proper mating with connecting parts or proper functioning of the device.
3.8.1 Metal defects. All components shall be free from cracks, splits, cold shuts, inclusions, porosity,
or any similar defect.
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