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 5920-00-467-1933
NSN 6620-01-507-5283
NSN 5998-01-322-8328
NSN 5835-00-257-2852
NSN 6110-00-420-4318
NSN 5985-00-889-4217
NSN 5910-01-633-9963
NSN 5965-01-485-8127
NSN 6650-01-240-2334
NSN 6645-01-062-0905
NSN 6685-01-495-3712
NSN 5985-01-631-8338