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 5965-00-405-3793
NSN 5960-01-570-8605
NSN 5920-00-938-7902
NSN 5960-00-761-5762
NSN 6650-00-964-9470
NSN 6105-00-882-0854
NSN 6220-00-241-4192
NSN 5915-00-114-1890
NSN 5950-01-627-5740
NSN 5905-01-283-4401
NSN 5915-01-371-2906
NSN 6110-01-103-4046