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 5930-01-332-2047
NSN 5935-00-650-5888
NSN 6645-01-146-9158
NSN 5990-01-156-8862
NSN 6130-01-444-4518
NSN 6220-00-030-6728
NSN 5855-01-262-8013
NSN 6150-01-197-6239
NSN 5915-01-581-7457
NSN 5930-01-130-8493
NSN 5835-01-572-9308
NSN 2925-01-294-9823