The '-3' is sheet three of the drawing; psu is a power supply unit
NSN 5965-00-954-3011
NSN 6240-01-633-9357
NSN 6135-01-618-2199
NSN 5930-00-185-5142
NSN 2925-00-004-1278
NSN 6240-00-456-2578
NSN 5990-00-202-5127
NSN 2925-01-483-2389
NSN 6145-01-049-6660
NSN 6645-00-244-0359
NSN 5895-01-327-5025
NSN 5915-00-876-6799
Last Updated: 06/01/2025