A very sensitive instrument used to establish accurately the horizontal plane. It consists of a machined and scraped metal base with an involute groove or flat base. It has an adjustable or nonadjustable vial which may be graduated or plain. It has no mounting facilities.
Classification: Handtools (including glass cutters) and parts thereof, nesoi, of basemetal
NSN 5996-00-410-8554
NSN 6150-01-181-7843
NSN 5910-01-584-9271
NSN 6650-01-195-3957
NSN 6610-01-242-9674
NSN 6645-01-330-6028
NSN 6110-01-030-1264
NSN 6220-01-092-8959
NSN 5925-01-194-5532
NSN 5935-00-312-2576
NSN 6220-00-730-5808
NSN 4140-01-083-1919