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 6650-00-964-9470
NSN 6240-01-452-1842
NSN 6685-01-610-5258
NSN 5835-01-406-4066
NSN 5895-00-628-2078
NSN 5915-01-016-6341
NSN 6110-00-111-2761
NSN 5915-01-534-7614
NSN 5895-01-359-8704
NSN 6240-01-019-8068
NSN 5905-00-253-1233
NSN 5905-01-253-1818