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 5910-01-166-5536
NSN 6320-00-116-3658
NSN 5990-01-606-9305
NSN 2925-01-534-7314
NSN 5975-00-845-0899
NSN 5915-00-493-4374
NSN 5835-00-163-3165
NSN 6620-01-519-2628
NSN 5945-01-551-7889
NSN 6145-00-929-4205
NSN 5895-00-866-7789
NSN 5925-01-226-3048