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 6145-00-080-4529
NSN 6650-00-087-6428
NSN 4140-00-173-0706
NSN 6220-00-692-9873
NSN 5855-01-607-6521
NSN 6135-01-633-8502
NSN 5930-01-442-5198
NSN 5945-01-562-9612
NSN 5960-01-654-4353
NSN 5965-01-327-9234
NSN 2925-00-246-3077
NSN 7035-01-562-7857