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 5895-01-328-6632
NSN 5990-00-518-0684
NSN 6645-01-128-0895
NSN 5998-01-305-8447
NSN 5905-01-202-8115
NSN 6135-01-486-1443
NSN 5925-00-041-1935
NSN 6320-00-116-3658
NSN 6610-00-526-9440
NSN 6650-01-596-8627
NSN 5996-00-838-7841
NSN 6130-00-058-0124