Aluminum 4 inch dust cap. Goes on coupler. Emco wheaton valves for bottom loading and unloading
NSN 5915-00-025-1763
NSN 5950-01-601-6559
NSN 5996-01-317-3676
NSN 5930-00-549-1445
NSN 2925-00-766-1278
NSN 4140-01-439-5029
NSN 7035-01-214-5171
NSN 6320-01-125-3361
NSN 6650-01-397-6325
NSN 6145-00-104-7789
NSN 2925-00-824-2186
NSN 6650-01-338-6042