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 6320-01-454-1965
NSN 5835-01-232-6904
NSN 6620-01-167-0881
NSN 6220-01-518-3360
NSN 6240-00-691-1397
NSN 5998-00-007-4424
NSN 5960-01-072-2876
NSN 5945-01-618-3615
NSN 5985-00-658-2879
NSN 5990-01-467-7575
NSN 5905-01-429-8690
NSN 6130-01-329-4433