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 6220-01-561-1871
NSN 5910-01-157-3061
NSN 5945-01-113-7250
NSN 5925-00-525-4037
NSN 5915-00-730-6761
NSN 7035-01-413-1021
NSN 5998-01-089-9725
NSN 6620-00-019-8424
NSN 5990-01-633-9503
NSN 5895-01-454-6875
NSN 5905-01-180-6601
NSN 5920-00-727-0595