Aluminum 4 inch dust cap. Goes on coupler. Emco wheaton valves for bottom loading and unloading
NSN 5975-00-606-8604
NSN 5975-01-198-7899
NSN 7035-01-445-3563
NSN 2925-01-471-3365
NSN 5990-01-081-3845
NSN 5965-00-782-1662
NSN 6130-00-343-1660
NSN 6135-00-299-6918
NSN 6650-00-074-2445
NSN 5950-01-247-3531
NSN 5999-01-062-2612
NSN 5925-00-950-4290