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 5935-01-261-0843
NSN 5975-00-857-9127
NSN 6110-01-371-1978
NSN 5935-01-147-9920
NSN 6145-01-306-2436
NSN 5905-01-144-7932
NSN 6650-01-207-2905
NSN 6240-00-155-5817
NSN 5996-01-381-6564
NSN 6220-01-035-1759
NSN 6220-01-123-8878
NSN 5998-00-902-8693