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 5960-01-187-0392
NSN 5895-01-206-4248
NSN 6145-00-419-0550
NSN 5915-01-123-9956
NSN 6610-00-292-9895
NSN 5935-01-081-0188
NSN 5930-01-250-8464
NSN 6145-01-055-6340
NSN 5905-00-869-4880
NSN 6105-00-968-3189
NSN 6220-01-529-1959
NSN 5915-01-431-0774