MIL-DTL-24231E(SH)
3.5.5 Hardness.
3.5.5.1 Hardness. Ni-Cu-Al alloy parts shall have a minimum hardness of 250 Brinell or 24 Rockwell "C" (see
3.5.5.2 Rubber packing. Rubber packing shall have a durometer hardness as specified in 3.1 when tested as
specified in 4.5.5.2.
3.5.6 Bonding (type I). Type I fittings shall withstand the bonding test, as applicable, (see figure 1 and
3.5.7 Underwater explosion (types III and IV). Unless otherwise specified (see 6.2), the underwater explosion
requirement and test procedures for Types III and IV fittings shall be as specified in 4.5.7.
3.5.8 Operation (types I through V). Types I through V fittings shall operate as specified herein when tested as
specified in 4.5.8.
3.5.9 Dye penetrant (types II through VI). Types II through VI fittings shall withstand the dye penetrant test
(see 4.5.9) as applicable, without cracks. Welds shall withstand the applicable dye penetrant tests.
3.5.10 Shock. The pressure-proof fittings shall withstand shock in accordance with Grade A, Class I, Type A
for lightweight equipment of MIL-S-901 when tested (see 4.5.10).
3.5.11 Vibration. The pressure-proof fittings shall withstand vibration in accordance with Type I of
MIL-STD-167-1 when tested (see 4.5.11).
3.6 Marking. Manufacturer s marking shall be that of the prime manufacturer responsible for the final
acceptance of equipment.
3.6.1 Designation and information plates. Designation and information plates shall be in accordance with
Type B or C corrosion-resisting steel (CRES), or Type H [aluminum (Al) alloy)] of MIL-DTL-15024, 1/16 inch thick.
Plates shall be constructed for severe service in accordance with MIL-P-15024/5.
3.6.2 Receptacle, single and multiple cable connector bodies, and hull insert plug. Manufacturer s marking
consisting of the military part number, manufacturer s serial number, and heat code shall appear on the outboard
(unthreaded) end of each hull insert plug, on the outer diameter of each multiple cable connector body, single cable
connector body, and receptacle body. The marking shall be permanent and legible, and shall be applied so as not to
induce detrimental stresses or cause malfunction of the part. Electro-chemical etching and vibra tool etching are
considered satisfactory. Lettering shall be ⅛-inch minimum.
3.6.3 Body nut and washer. Manufacturer s marking consisting of the military part number, manufacturer s
serial number, and heat code shall appear on the exterior section of each Ni-Cu-Al alloy nut and washer. The
markings shall be permanent and legible, and shall be applied so as not to induce detrimental stresses or cause
malfunction of the part. Lettering shall be ⅛-inch minimum.
3.6.4 Molded plug. Manufacturer s markings shall appear on the exterior molded section of each Type I
molded plug assembly (straight or 90-degree). The marking shall consist of the military part number and the
manufacturer s symbol. Markings shall be a part of the mold, embossed, ⅛-inch minimum lettering, legible, and
located so as not to affect the function of the mold.
3.6.5 Pin and socket contacts. Pin and socket contact numbers shall be molded into the polyurethane and
epoxy resin compounds. The orientation of the numbers shall be as shown on the applicable specification sheet.
Lettering shall be 1/16-inch minimum.
3.7 Workmanship. Penetrators, plug assemblies, and accessories shall meet all design dimensions and
interchangeability requirements of this specification. Loose contacts, poor molding fabrication, loose materials,
defective bonding, damaged or improperly assembled contacts, peeling or stripping of plating or finish, galling of
mated parts, nicks or burrs on metal parts, and post-molding warpage will be considered adequate basis for rejection
of items as being of inferior quality for the purpose intended.
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