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 5999-01-406-3161
NSN 6110-00-451-1462
NSN 5895-00-185-4543
NSN 5935-01-534-2577
NSN 6610-00-327-7540
NSN 5855-01-462-0495
NSN 5930-01-427-9851
NSN 6650-00-405-6323
NSN 6135-00-985-7846
NSN 6130-01-502-5353
NSN 5950-01-447-2839
NSN 6145-01-065-0799