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 5920-00-427-7267
NSN 5895-00-676-9453
NSN 5930-01-442-3907
NSN 5999-01-320-2965
NSN 5930-01-010-4553
NSN 6150-00-922-8908
NSN 4140-00-245-2715
NSN 5915-01-376-0898
NSN 6610-01-457-1974
NSN 5910-01-267-9919
NSN 4140-01-334-4113
NSN 5996-00-802-6095