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 5990-01-621-6969
NSN 5915-01-559-1326
NSN 6645-01-268-0544
NSN 5920-00-883-8633
NSN 6620-01-497-1746
NSN 6135-01-384-5906
NSN 5945-01-423-7966
NSN 6150-01-582-4169
NSN 7035-00-096-9986
NSN 6650-01-440-9215
NSN 5999-01-186-3242
NSN 5945-01-233-1209