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 5915-00-420-1557
NSN 5905-01-499-2509
NSN 5999-00-081-8621
NSN 5998-01-600-0811
NSN 5895-01-119-1601
NSN 5835-01-044-2628
NSN 5998-01-302-3473
NSN 6105-01-411-7377
NSN 6685-01-232-5882
NSN 5996-01-317-2948
NSN 6110-00-845-0524
NSN 5935-01-513-1858