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 5905-01-524-8110
NSN 5985-01-477-5311
NSN 7035-00-679-9027
NSN 5996-00-277-7384
NSN 5999-01-377-5794
NSN 7035-01-433-3547
NSN 6240-00-006-3725
NSN 6320-00-937-5625
NSN 6135-01-255-4786
NSN 6650-01-333-7918
NSN 6240-00-889-7349
NSN 2925-01-547-4565