Surface treatment is black crackle.
A signaling apparatus which operates electromagnetically and serves to indicate visually, or visually and audibly, whether a current is flowing, has flowed, or has changed direction of flow in one or more circuits. It is usually employed in connection with alarms, electric bells, or buzzers. See also alarm (as modified).
Classification: Parts of electric sound or visual signaling apparatus other than printed circuit assemblies, nesoi
NSN 5930-01-183-5455
NSN 6130-01-226-3907
NSN 6320-00-098-2858
NSN 5935-01-597-7812
NSN 5985-01-515-1566
NSN 5905-00-615-6699
NSN 5975-01-622-0722
NSN 5920-01-493-5567
NSN 5915-00-683-8248
NSN 5990-00-277-3763
NSN 5990-01-421-3325
NSN 2925-01-633-4048