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 6145-00-264-2137
NSN 5905-01-384-3382
NSN 5996-00-636-4849
NSN 6645-01-049-0972
NSN 5990-00-230-8981
NSN 6110-01-118-2411
NSN 5945-01-509-6010
NSN 5930-00-947-7064
NSN 5996-01-136-9353
NSN 6240-00-350-4375
NSN 7035-01-141-8076
NSN 2925-01-471-4912