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 4140-01-634-0330
NSN 5999-01-600-0443
NSN 7035-00-553-6951
NSN 6135-01-644-9348
NSN 6620-00-411-4983
NSN 6105-01-152-2800
NSN 2925-00-021-9580
NSN 6240-01-110-1363
NSN 6130-01-142-2698
NSN 5915-00-915-3454
NSN 6610-01-593-4643
NSN 5920-01-634-0250