MIL-STD-1285D
w/ CHANGE 1
4. GENERAL REQUIREMENTS
4.1 General. Functional and part identification marking shall be applied in the location specified in the acquisition document. Where size, surface condition, or other design considerations will not allow marking in accordance with either method I or II, the acquisition document shall specify the method of application (unit package, tag, or label), and the exact marking requirements. Special marking (caution warnings, radioactive) also shall be as specified in the acquisition document. Identification and marking requirements shall be in accordance with sections 4 and 5 of this standard, the applicable FSC section of this standard, and the peculiarities as included in the acquisition document. In the event of conflict between this standard and an acquisition document, the acquisition document shall govern. In the event of conflict between sections 4 and 5 and the requirements of the appendixes, the appendixes shall have precedence.
4.2 Marking process. Any marking process that will not adversely affect the function of the finished part may be used. Any tags used shall have all burrs and rough edges removed. In addition:
a. Marking shall remain legible following completion of all inspections specified in the acquisition document for the normal life expectancy of the part (see 6.3).
b. Marking materials shall be nonfading.
c. Paper labels for attachment to parts shall not be used.
* 4.3 Symbols. Symbols used in functional and part identification marking shall be in accordance with IEEE 280 or
4.4 Polarity and functional markings. Parts having polarized or other functional characteristics shall always be marked with a polarity symbol or indicators for special flow direction, rotation direction, and connections, as specified in the acquisition document. These markings, as applicable, take precedence over all other marking.
4.5 Part identification marking. Each part shall be marked in accordance with the full marking or minimum marking requirements stated herein, as specified in the acquisition document. Any other markings that may be applied to the part shall not interfere with, obscure, or confuse those specifications specified herein.
4.5.1 Approved standards marking (see ASME Y14.100). An item covered by an approved standard and used without alteration or selection shall be identified by the standard PIN (such as MS number for Department of Defense specification sheets, see figure 1).
4.5.2 Approved government specification marking (see ASME Y14.100). An item covered by an approved government specification containing a part identification system and used without alteration shall be identified by that part identification (see figure 1).
4.5.3 Marking parts acquired from, but not manufactured by, the design activity (see MIL-STD-130). When the design activity uses subcontractors for the manufacture of an item, but retains full design control, quality assurance control, and full responsibility to the acquiring activity for the delivered product, only the design activity's CAGE code is required as part of the identifying number. If design control, quality control, or delivered product warranty responsibility is delegated to such subcontractor, then both the design activities and the subcontractor's CAGE codes are required to be marked on the item.
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