MIL-DTL-781J
3.6.2 Washing. Upon completion of any treatment specified in 3.6.1except (d), the
terminals shall be thoroughly rinsed in water and dried.
3.6.3 Retreatment. Retreatment of terminals after swaging is not required.
3.7 Surface roughness. The surface roughness of the machined surface, except in the
threaded area, shall not exceed 125 root mean square (RMS) in accordance with ASME B46.1.
3.8 Performance.
3.8.1 Distortion. Except for NAS494 and NAS1435 terminals, elongation shall not
exceed 0.001 inch per inch in the direction of load application (see 4.6.1) for any measured
dimension resulting after the application of a proof load. The proof load shall be applied for 5
seconds and shall be 60 percent of the minimum breaking strength (MBS) as specified in the
related MS sheet for terminal sizes up to 3/8. Sizes 7/16 and larger shall be tested at a proof load
of 40 percent MBS.
3.8.1.1 Marks from NAS1435 fittings. Marks on MS20663, MS20664, or AIA NAS494
ball end fittings caused by AIA NAS1435 fittings during proof loading are not considered
distortion and shall not be considered as failures of the ball fittings.
3.8.2 Breaking strength. Terminals shall be capable of withstanding a tension load equal
to the MBS specified on the applicable MS or NAS sheet when tested in accordance with 4.6.2.
3.8.3 Hardness. When tested in accordance with paragraph 4.6.3, terminal hardness
readings shall not exceed a Rockwell A-scale value of 62.5 or Rockwell B-scale value of 100.
3.9 Identification of product. Terminals shall be marked for identification in accordance
with the applicable MS or NAS sheet. The maximum depth of marking shall be in accordance
with the applicable MS or NAS sheet, however, on certain curved surfaces, the maximum depth
specified may be exceeded to assure adequate legibility. Unless otherwise specified, the position
of the marking is optional.
3.9.1 Method of marking. Indention as specified on the applicable MS sheets may be
done by stamping, chemical or laser etching, or any other method that will provide a permanent
mark. Method of marking is at the manufacturer's option.
3.10 Workmanship. Terminals shall be uniform in quality and free from pits, voids,
burrs, sharp edges, rust, laps, cracks, seams and other detrimental defects that would prevent
proper functioning or performance. Slight burrs in the thread-locking slot area that do not
prevent gauging or interfere with installation of the barrel and locking clip are acceptable.
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