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 5920-01-253-5368
NSN 6320-01-119-3935
NSN 5950-01-250-7526
NSN 4140-00-843-7262
NSN 5910-01-378-7678
NSN 5930-01-171-0905
NSN 5945-01-410-2836
NSN 5935-01-602-0251
NSN 6220-00-186-8565
NSN 5990-01-437-4876
NSN 6610-00-670-7803
NSN 6110-00-501-5585