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 5950-01-385-3490
NSN 6130-00-240-4765
NSN 5925-01-469-3103
NSN 5999-00-122-8817
NSN 6685-00-689-8672
NSN 6320-01-215-1133
NSN 4140-00-720-4993
NSN 5855-00-586-6255
NSN 6650-00-975-2438
NSN 5996-01-633-7979
NSN 5985-01-583-1238
NSN 5915-01-651-2021