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 5965-00-578-8931
NSN 5975-00-553-7151
NSN 5935-01-064-3798
NSN 6645-00-595-5431
NSN 5835-01-632-6627
NSN 5950-00-178-8469
NSN 4140-01-294-6491
NSN 6130-01-146-3974
NSN 5835-01-250-6027
NSN 5975-00-633-8532
NSN 5905-01-360-9388
NSN 5920-00-758-7846