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 5935-00-167-8028
NSN 6105-01-142-9790
NSN 5895-01-469-7056
NSN 6150-00-169-2854
NSN 5975-01-554-9469
NSN 2925-01-215-5022
NSN 5925-00-342-3637
NSN 5935-00-689-5187
NSN 5905-01-563-5216
NSN 5835-00-034-4976
NSN 6145-01-517-3252
NSN 6135-00-856-1343