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 6135-01-255-9129
NSN 6110-01-372-0095
NSN 5920-01-164-8260
NSN 5835-01-092-6759
NSN 6105-01-380-2144
NSN 5835-00-707-6266
NSN 6620-01-036-0751
NSN 5910-00-629-5167
NSN 5996-00-100-1238
NSN 5935-01-316-4425
NSN 5925-01-379-2346
NSN 5996-01-016-2046