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 5990-00-893-8998
NSN 6320-00-194-4252
NSN 5985-01-289-5243
NSN 5990-01-094-7740
NSN 5950-00-994-4878
NSN 5945-01-183-0411
NSN 5915-00-807-8547
NSN 5855-01-634-0259
NSN 5996-01-623-1988
NSN 6620-01-087-2354
NSN 6135-00-840-6451
NSN 5965-01-322-8136