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 6130-00-702-0402
NSN 5935-00-139-6729
NSN 5950-01-351-8836
NSN 5990-01-493-4039
NSN 5998-01-532-5792
NSN 5975-01-277-7329
NSN 6645-01-143-0137
NSN 5999-01-282-0880
NSN 5945-01-034-7214
NSN 5985-00-360-6529
NSN 5965-01-437-0905
NSN 2925-01-535-7235