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 5930-01-476-1499
NSN 5960-00-153-7115
NSN 5855-00-869-3635
NSN 6240-00-553-8891
NSN 5965-00-342-5126
NSN 6240-00-144-4693
NSN 5996-00-597-2234
NSN 6145-00-762-4845
NSN 6145-01-337-0008
NSN 5930-00-146-4220
NSN 5855-01-385-4234
NSN 5999-01-054-1796