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 6240-01-401-5340
NSN 6105-01-075-5943
NSN 6650-01-463-8405
NSN 5935-01-168-8781
NSN 2925-00-603-9371
NSN 7035-01-281-3642
NSN 6240-01-123-9040
NSN 4140-00-758-6249
NSN 5895-01-004-9861
NSN 6130-01-521-3712
NSN 6130-01-086-0792
NSN 5999-00-791-1322