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 5895-01-401-5388
NSN 6650-00-443-4292
NSN 5930-01-649-3055
NSN 6650-00-868-9092
NSN 5835-01-274-1035
NSN 5935-01-549-5666
NSN 6240-00-275-1950
NSN 5950-01-035-7712
NSN 5950-01-073-4702
NSN 5960-00-193-5088
NSN 6320-00-681-1324
NSN 6150-00-063-1907