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 6135-00-998-5884
NSN 5985-00-751-1632
NSN 6645-00-700-4892
NSN 5905-01-145-8333
NSN 5935-01-105-9868
NSN 6110-01-483-4421
NSN 5835-00-677-9659
NSN 4140-00-188-3800
NSN 5835-01-497-5029
NSN 5960-00-679-6507
NSN 5996-00-102-1563
NSN 5985-01-280-2198