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 5925-01-296-5360
NSN 5996-00-323-1294
NSN 6150-00-050-7732
NSN 5910-01-552-0863
NSN 7035-01-377-0760
NSN 5895-01-574-8929
NSN 6320-01-512-2031
NSN 5910-01-368-7328
NSN 5985-00-005-2503
NSN 5930-00-903-6161
NSN 5945-01-115-2868
NSN 6150-00-259-4632