MIL-DTL-14857B
3. REQUIREMENTS
3.1 Materials. All materials used in the manufacture of the initiators shall conform strictly 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 initiator metal parts assembly shall contain a
new shear pin and O-rings.
3.2 Hydrostatic pressure. The initiator chamber and cap shall withstand a hydrostatic pressure of 5500
to 6500 pounds per square inch (psi) for 15 seconds, minimum, without deformation or mechanical failure
(see 6.3.1).
3.3 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 shall have the existing protective finish stripped and the specified protective finish
reapplied (see 6.3.2).
3.4 Residual magnetism. The metal parts assembly shall not deflect the indicator of the compass more
than five degrees in either direction using procedures in 4.5.3.
3.5 Shear pin strength. The shear pin, after application of protective finish, shall shear when a load of
41 ± 5 pounds is applied at the steady rate of 0.125 inch per minute.
3.6 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 handtight.
3.6.1 Integrated plant products. When remanufacturing and loading of 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.
3.6.2 Threaded component parts. Class 2A or 2B thread gage shall be used on component part
inspection versus class 3A or 3B required on remanufactured hardware for initiators.
3.7 Workmanship. The requirements for workmanship are as specified on the applicable drawings,
referenced specifications, and the following:
3.7.1 Metal defects. All components shall be free from cracks, splits, cold shuts, inclusions, porosity, or
any similar defect.
3.7.2 Burr. No part shall have a burr which might interfere with the assembly or function of the item or
which might be injurious to personnel handling the item.
3.7.3 Foreign matter. No part or assembly shall contain chips, dirt, grease, rust, corrosion or other
foreign matter.
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