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 5965-01-398-0779
NSN 5998-01-234-8995
NSN 5925-01-129-4135
NSN 6645-01-342-1069
NSN 5905-01-386-7439
NSN 6150-00-924-4799
NSN 6220-01-468-3701
NSN 5999-01-180-8303
NSN 5975-00-583-6091
NSN 5935-01-478-9190
NSN 5935-01-590-2982
NSN 6105-01-608-2530