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 5945-00-158-5386
NSN 5920-00-406-2712
NSN 5996-01-311-4424
NSN 6240-00-776-1614
NSN 5985-01-403-2835
NSN 5945-00-973-5010
NSN 6645-01-523-8809
NSN 5835-01-399-5820
NSN 5915-01-519-3287
NSN 6650-01-591-3342
NSN 5925-00-100-5760
NSN 4140-01-218-5919