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 6620-00-435-4041
NSN 5965-01-129-1968
NSN 6620-01-314-3635
NSN 6650-01-242-8922
NSN 5910-01-025-6987
NSN 6150-01-354-1691
NSN 5895-01-164-7345
NSN 5925-01-151-2780
NSN 5855-00-482-9876
NSN 6220-01-579-8919
NSN 5960-01-048-7305
NSN 5915-01-221-8135