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 6105-01-409-2023
NSN 6620-01-300-2631
NSN 5998-00-261-8727
NSN 5895-01-115-6467
NSN 5895-01-342-1116
NSN 6650-01-423-3767
NSN 5990-01-181-4143
NSN 5835-00-998-5757
NSN 5835-00-830-6416
NSN 5965-01-051-9250
NSN 5895-01-652-3361
NSN 6645-01-525-5181