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 4140-01-519-9343
NSN 6105-01-281-4563
NSN 6105-01-199-1796
NSN 2925-01-535-7235
NSN 5945-00-679-5625
NSN 5910-01-648-2045
NSN 5990-00-188-6111
NSN 5996-01-272-5685
NSN 5910-01-010-9961
NSN 5835-00-198-4936
NSN 6240-01-147-5424
NSN 6645-01-250-2702