MIL-DTL-21248C
2.3 Non-Government publications. The following documents form a part of this document
to the extent specified herein. Unless otherwise specified, the issues of these documents are
those cited in the solicitation or contract.
AMERICAN SOCIETY FOR QUALITY (ASQ)
ASQ Z1.4
Sampling Procedures and Tables for Inspection by Attributes.
(Copies of this document are available from www.asq.org American Society for Quality
Control, 600 North Plankinton Avenue, Milwaukee, WI 53203.)
AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)
ASTM B194
Copper-Beryllium Alloy Plate, Sheet, Strip and Rolled Bar
(Copies of these documents are available from www.astm.org or the American Society for
Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.)
SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)
SAE AIR4127
Steel: Chemical Composition and Hardenability
SAE AMS2700
Passivation of Corrosion Resistant Steels
SAE AMS5520
Steel, Corrosion and Heat-Resistant, Sheet, Strip, Foil,
and Plate 15Cr - 7.1Ni - 2.5Mo - 1.1AI Solution Heat
Treated, Precipitation Hardenable
SAE AMS-QQ-P-416
Plating, Cadmium (Electrodeposited)
(Copies of these documents are available from www.sae.org or the Society of
Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096-0001.)
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, 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 All requirements specified herein apply to all types, classes, materials and sizes of
retaining rings listed herein or as otherwise specified in the contract or order (see 3.5 and 6.2).
3.2 Materials. Material used in the manufacture of retaining rings shall be either carbon
steel, corrosion resisting steel or copper-beryllium-alloy conforming to 3.2.1, 3.2.2 or 3.2.3 as
applicable (see 6.2).
3.2.1 Carbon steel. Carbon steel shall conform to the chemical composition of SAE
AIR4127, steel numbers 1060 through 1090 inclusive.
3.2.2 Corrosion resisting steel. Corrosion resisting steel shall conform to the composition of
SAE AMS5520 or equivalent.
3.2.3 Copper-beryllium-alloy. Copper-beryllium-alloy shall conform to ASTM B194.
3.3 Physical properties. Retaining rings shall conform to the physical requirements as specified
in 3.3.1 and 3.3.2.
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