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 6105-01-573-7261
NSN 7035-01-441-9509
NSN 5835-01-178-4154
NSN 5920-00-829-3634
NSN 6610-01-424-0283
NSN 5985-00-375-1837
NSN 5960-01-531-2404
NSN 6110-00-460-7179
NSN 5835-01-463-2334
NSN 6320-01-084-7456
NSN 5920-00-169-4428
NSN 5990-01-013-8464