MIL-DTL-24251F
DEPARTMENT OF DEFENSE STANDARDS
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Identification Marking of U.S. Military Property.
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Electronic and Electrical Component Parts.
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Dissimilar Metals
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Marking of Electrical and Electronic Parts.
(Copies of these documents are available online at https://quicksearch.dla.mil/ or https://assist.dla.mil/ or from the
Standardization Document Order Desk), 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)
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 TESTING AND MATERIALS (ASTM)
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Materials, Feebly Magnetic, Permeability of. Standard Test Methods For
(Applications for copies can be found online at https://www.astm.org/ or should be addressed to the American
Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.)
ELECTRONIC COMPONENTS ASSOCIATION (ECA)
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Electron Tubes.
(Copies of these documents are available online at https://global.ihs.com or Global Engineering Documents, Attn:
Customer Service Department, 15 Inverness Way East, Englewood, CO 80112-5776.)
NATIONAL CONFERENCE OF STANDARDS LABS (NCSL)
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Requirements for Calibration of Measuring and Test Equipment.
(Applications for copies can be found online at https://www.ncsli.org or should be addressed to the National
Conference of Standards Labs (NCSL), 1800 30th Street, Suite 305B, Bolder, CO. 80301.)
2.4 Order of precedence. 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 part requirements shall be as specified herein and in accordance with the
applicable specification sheet. In the event of any conflict between requirements of this specification and the
individual specification sheet, the latter shall govern.
3.2 Material. The material shall be as specified (see 3.1). When a definite material is not specified, a material
shall be used which will enable the tube shields, retainers (bases), and adapters to meet the requirements of this
specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of the
acceptance of the finished product.
3.2.1 Dissimilar metals. Where dissimilar metals are used in intimate contact with each other, protection against
corrosion shall be provided. Dissimilar metals must be as recommended in MIL-STD-889.
3.3 Design, construction, and physical dimensions. The tube shields, retainers (bases), and adapters shall be of
the design, construction, and physical dimensions specified (see 3.1). The design shields, retainers (bases), and
adapters shall be such that they will mount to the chassis using the same hardware (including screws), as that of the
applicable tube socket.
3.3.1 Finish. Unless otherwise specified (see 3.1), tube shields, retainers (bases), and adapters shall be treated
with a black matte finish. That portion of the mating shield and retainer (base) or retainer (base) and chassis where
low electrical resistance is required may be finished with other than black matte.
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