A small heavy weight with some means of attaching a line at one end. It is used for finding the vertical or perpendicular line to a horizontal plane.
NSN 6685-01-657-9686
NSN 6110-01-052-8081
NSN 5990-00-081-1266
NSN 5990-00-070-0538
NSN 5960-01-487-4791
NSN 6105-00-991-1844
NSN 2925-01-298-2674
NSN 6150-01-497-6540
NSN 5910-01-381-2007
NSN 6130-00-482-1257
NSN 5998-00-942-7934
NSN 5996-01-222-0790