Aluminum 4 inch dust cap. Goes on coupler. Emco wheaton valves for bottom loading and unloading
NSN 6240-01-449-2883
NSN 6610-01-303-2281
NSN 4140-01-418-2640
NSN 5920-01-634-0250
NSN 5999-01-090-0664
NSN 6620-00-028-3370
NSN 5996-00-479-5939
NSN 2925-01-424-0235
NSN 6150-01-176-0221
NSN 5855-00-973-5717
NSN 5998-01-528-9664
NSN 6110-00-391-7000