There is a bar used for tightening attached to the top
A threaded closure for openings in the body and/or end(s) of a metal shipping barrel or drum.
Classification: Other fittings nesoi of iron or nonalloy steel
NSN 5990-01-432-4249
NSN 6110-01-553-8608
NSN 5960-00-228-3793
NSN 5945-00-707-3384
NSN 5910-00-148-9336
NSN 2925-01-502-2385
NSN 5920-00-584-4592
NSN 5975-00-077-4918
NSN 5990-01-481-5274
NSN 6645-00-893-4190
NSN 5835-01-089-1076
NSN 5975-00-045-9819