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 5965-01-315-5764
NSN 5985-01-383-6799
NSN 5910-01-044-9153
NSN 5990-01-626-3840
NSN 6130-01-400-6123
NSN 2925-00-816-8765
NSN 5999-01-196-6962
NSN 6220-01-234-5200
NSN 5975-00-105-5107
NSN 6685-01-572-7860
NSN 6150-01-406-8168
NSN 6150-01-116-2406