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 5975-01-107-4198
NSN 2925-01-426-3410
NSN 5950-01-122-4787
NSN 5920-00-010-6652
NSN 5855-00-256-5562
NSN 2925-01-244-3016
NSN 5930-00-336-9130
NSN 5935-00-409-5424
NSN 5950-01-058-0877
NSN 5999-01-005-7307
NSN 6645-01-302-9608
NSN 6645-01-503-2240