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 6135-01-449-2144
NSN 5925-00-803-5491
NSN 5835-01-281-7281
NSN 7035-01-182-1086
NSN 5925-01-296-2179
NSN 5975-00-501-3777
NSN 5915-00-935-4984
NSN 5855-01-649-2899
NSN 5990-01-416-0362
NSN 5999-01-134-2838
NSN 6220-01-214-0270
NSN 6150-00-270-8497