MIL-DTL-24705B(SH)
ASTM B21/B21M
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Standard Specification for Naval Brass Rod, Bar, and Shapes
ASTM B117
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Standard Practice for Operating Salt Spray (Fog) Apparatus
ASTM B209
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Standard Specification for Aluminum and Aluminum-Alloy Sheet and
Plate
ASTM B221
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Standard Specification for Aluminum and Aluminum-Alloy Extruded
Bars, Rods, Wire, Profiles, and Tubes
ASTM D395
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Standard Test Methods for Rubber Property Compression Set
ASTM D2240
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Standard Test Method for Rubber Property Durometer Hardness
ASTM D4066
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Standard Classification System for Nylon Injection and Extrusion
Materials
ASTM D5948
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Standard Specification for Molding Compounds, Thermosetting
(Copies of these documents are available from ASTM International, 100 Barr Harbor Dr., P.O. Box C700, West
Conshohocken, PA 19428-2959 or online at www.astm.org.)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between
the text of this document and the references cited herein (except for related specification sheets), the text of this
document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless
a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with
the applicable specification sheet. In the event of any conflict between the requirements of this specification and the
specification sheet, the latter shall govern.
3.2 Qualification. Multiple cable penetrator frames, accessories, and insert items furnished under this
specification shall be products which are authorized by the qualifying activity for listing on the applicable qualified
products list at the time of award of contract (see 4.3). Prequalification tests (see 4.2) shall be conducted prior to
qualification.
3.3 Materials. Materials shall be as specified (see 3.1). When not specified, the contractor may select any
material that will satisfactorily perform the intended function of the component in the equipment assembly, provided
the component meets the requirements of the specification.
3.3.1 Metals and alloys. Metals and alloys for frames and accessories (see 6.4.5 and 6.4.3) shall be corrosion-
resistant, or be given a corrosion-resistant treatment or coating in accordance with MIL-HDBK-454 where non-
corrosion-resistant steel is used for a frame that is to be welded to a bulkhead or other partition. The metal shall be
cleaned and receive a gray paint primer. Metals and alloys not covered in this specification shall be approved by the
Naval Sea Systems Command (NAVSEA) before use in a multiple cable penetrator.
3.3.1.1 Corrosion-resisting and nonmagnetic metals. When nonmagnetic material or resistance to corrosion is
required for structural purposes, the material shall be selected from the following:
a. Alloys, aluminum - Types 5052 or 5086 as specified in ASTM B221, or Type 5083 as specified in
ASTM B209.
b.
Brass - Type C46400 as specified in ASTM B21/B21M.
c. Corrosion-resistant steel (CRES) - ASTM A276 Grades 304L, 316L, 321, or 347; Condition A; passivated
in accordance with ASTM A967.
3.3.1.2 Steel parts. Unless otherwise specified (see 3.1), steel for frames and accessories shall be as specified
in 3.3.1.1.c; ASTM A131, Grades A, B, or C; or ASTM A108, Grade C1018.
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