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 6240-01-200-7937
NSN 4140-01-534-9987
NSN 2925-01-197-7864
NSN 5945-01-006-9422
NSN 5930-01-408-4632
NSN 6620-01-348-8256
NSN 6240-00-283-1263
NSN 6145-01-200-6377
NSN 6145-01-360-0208
NSN 5965-01-530-7737
NSN 6320-00-070-4544
NSN 5915-00-681-6299