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 6650-01-399-8552
NSN 6610-00-935-7131
NSN 5910-01-649-1475
NSN 5925-01-566-1460
NSN 5930-01-258-2801
NSN 6130-01-556-7433
NSN 5930-01-408-5586
NSN 6105-01-437-2539
NSN 5935-01-431-0480
NSN 5960-00-766-6042
NSN 5920-00-983-8888
NSN 5895-00-952-3490