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 5930-01-424-5196
NSN 5996-00-823-6081
NSN 5985-00-713-8568
NSN 5996-01-475-5728
NSN 5990-01-460-6390
NSN 6685-00-874-7240
NSN 4140-01-118-1896
NSN 2925-00-373-8837
NSN 6620-01-252-1240
NSN 5996-00-141-0288
NSN 5910-01-610-7596
NSN 6105-01-522-1398