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 5950-01-514-2743
NSN 5998-01-208-4637
NSN 4140-00-574-1869
NSN 6620-01-383-1997
NSN 5905-01-091-5492
NSN 5935-00-227-1110
NSN 6240-00-938-1512
NSN 5915-00-702-3030
NSN 5996-00-735-6822
NSN 6685-01-248-4463
NSN 6130-01-562-0859
NSN 5960-00-647-9159