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 5985-00-896-3091
NSN 6105-01-206-8832
NSN 6150-01-192-2497
NSN 5996-01-442-5218
NSN 5910-01-631-4467
NSN 5960-00-232-2512
NSN 5999-01-434-9427
NSN 6130-01-431-5796
NSN 6650-01-433-8101
NSN 5920-01-180-8307
NSN 6620-00-912-0255
NSN 6320-00-284-1524