MIL-DTL-15024F
3.4.1.2 Marking method. Characters shall be either sunken or relief etched. Etched areas
should be filled with the appropriate color (see 3.2.3).. Fillings of markings with paint, enamel, or
lacquer may be omitted for color anodized aluminum plates meeting color styles III, VIII, and IX.
Plates that are relief etched (characters in relief) should have a border in relief. Additional
information may be permanently stamped.
3.4.1.3 Dimensions. Etched areas shall be not less than 0.003-inch deep except that color
anodized plates (which are not filled) should be etched to the depth necessary to produce clear,
legible characters. The thickness of type A plates shall be not less than 0.03 inch.
3.4.2 Type B.
3.4.2.1 Materials. The following materials are recommended, but are not mandatory:
a. Brass.
b. Corrosion resistant steel.
c. Aluminum alloy.
d. Plastic (type NDP opaque and fungus resistant in accordance with ASTM-D709).
3.4.2.2 Marking method. All characters shall be engraved in the plate. Engraving in metal
plates shall be filled with the desired color of opaque filler. Additional information may be
permanently stamped except for type B plastic plates.
3.4.2.3 Dimensions. Engraving shall be uniform in depth for characters of the same size.
The engraving shall be not less than 0.008-inch deep. In plastic plates, the depth shall ensure
uniform penetration of the cover (top layer). Line widths shall be not less than 1/8 or more than
1/5 of the related character heights. The thickness of type B plates shall be not less than
0.03 inch.
3.4.3 Type C.
3.4.3.1 Materials. The following materials are recommended, but are not mandatory:
a. Brass.
b. Corrosion resistant steel.
c. Aluminum alloy.
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