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 5960-01-466-1500
NSN 6105-01-497-1459
NSN 5998-01-180-4323
NSN 5920-00-357-0260
NSN 5930-01-020-4717
NSN 6610-00-760-9916
NSN 6240-00-646-6931
NSN 5945-01-058-5695
NSN 5895-00-286-3788
NSN 5935-01-241-2809
NSN 7035-00-232-4043
NSN 5985-01-359-5084