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 5915-01-386-0914
NSN 6220-00-007-9698
NSN 5910-00-803-2876
NSN 5935-00-708-7573
NSN 5910-01-097-2275
NSN 5945-00-595-8487
NSN 6135-01-554-4281
NSN 6645-01-559-0902
NSN 5985-00-175-0350
NSN 5935-00-308-0770
NSN 5945-01-099-5155
NSN 6130-01-321-7487