Terminal box, 10 terminal, 20 wires max, 1,000 volts, 40 amps max per terminal, submersible to 15 feet. Type 16TB10 terminal board mounted in a 6x9x4-1/2" deep brass enclosure. Part number M24558/20-529 per MIL-T-24558/20. NSN 5940-00-503-4204. Previously covered by NAVSHIPS drawing 815-1197015.