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 6130-00-083-3720
NSN 5945-01-010-3279
NSN 6150-01-625-9600
NSN 6645-00-664-4665
NSN 6320-00-937-5625
NSN 7035-01-534-7930
NSN 6110-01-145-1481
NSN 5950-01-205-5166
NSN 6240-00-128-0267
NSN 4140-01-420-6508
NSN 5999-00-300-7337
NSN 5935-00-027-1341