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 5915-01-114-5065
NSN 6320-00-513-8376
NSN 5915-01-538-7581
NSN 6620-00-147-6034
NSN 5985-00-287-9650
NSN 5915-01-099-1018
NSN 6110-01-344-9857
NSN 6610-01-476-9945
NSN 6220-01-462-5381
NSN 5975-00-884-0752
NSN 5999-01-133-1420
NSN 6130-00-528-1266