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 2925-00-373-8837
NSN 6220-00-330-3717
NSN 5925-00-574-4362
NSN 5935-01-403-2844
NSN 5985-01-198-4275
NSN 6320-01-166-3602
NSN 6135-01-440-9412
NSN 4140-01-450-6802
NSN 5910-01-580-2185
NSN 6610-01-135-7847
NSN 2925-01-140-8957
NSN 6150-01-020-8845