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 5895-01-391-5068
NSN 5998-01-577-4787
NSN 6135-00-078-9931
NSN 5945-01-181-5956
NSN 6220-01-087-9484
NSN 5915-00-497-0894
NSN 5930-01-577-2160
NSN 5990-00-673-1831
NSN 6130-01-359-9532
NSN 5990-01-338-2103
NSN 6645-00-795-5565
NSN 5835-01-354-0566