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 5996-01-417-3139
NSN 5905-00-175-2453
NSN 6610-01-352-5500
NSN 7035-01-384-9257
NSN 5996-00-237-6307
NSN 5930-01-462-0680
NSN 6685-00-043-0749
NSN 5960-00-285-1001
NSN 4140-01-245-3281
NSN 5835-00-269-2232
NSN 7035-00-135-4758
NSN 5935-01-630-2514