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 5920-00-274-6929
NSN 6620-00-160-0844
NSN 5910-01-604-8999
NSN 5915-01-581-9472
NSN 5950-00-219-6537
NSN 6110-01-527-6948
NSN 2925-00-465-6354
NSN 4140-01-485-1093
NSN 5920-01-153-2690
NSN 5996-01-158-5197
NSN 6220-01-170-2611
NSN 5998-00-862-3118