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 6240-00-342-9756
NSN 5975-00-050-6801
NSN 4140-01-533-5332
NSN 5895-01-278-6761
NSN 6220-01-144-4287
NSN 5990-01-286-0601
NSN 5985-01-057-2746
NSN 6320-00-572-0950
NSN 5998-01-510-3475
NSN 6645-01-370-4259
NSN 6645-00-697-5694
NSN 6650-00-364-7866