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 6105-01-473-2003
NSN 5915-01-372-3277
NSN 5960-01-035-3901
NSN 2925-01-607-7754
NSN 6130-01-394-4986
NSN 5950-00-737-5768
NSN 5975-01-078-2433
NSN 5920-00-298-0700
NSN 2925-01-222-7764
NSN 6620-00-003-2020
NSN 6650-01-409-0820
NSN 5930-00-111-6748