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 6220-00-351-4556
NSN 5835-01-593-3239
NSN 6105-01-153-2302
NSN 6645-00-998-2918
NSN 5965-01-594-1983
NSN 5965-01-113-7400
NSN 5895-01-461-3723
NSN 5855-00-298-0261
NSN 5990-01-382-5364
NSN 2925-01-415-2140
NSN 5965-00-964-1756
NSN 5999-01-480-0855