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 6105-01-167-0758
NSN 5930-01-337-1615
NSN 5835-01-249-7393
NSN 6220-01-378-7467
NSN 6150-01-164-0546
NSN 5835-01-424-0054
NSN 5855-01-430-5459
NSN 5985-01-004-6021
NSN 6320-00-331-7138
NSN 5996-00-566-9253
NSN 5975-01-390-0401
NSN 5910-01-132-4383