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 5915-01-298-1437
NSN 5998-01-021-5230
NSN 5855-00-138-2386
NSN 6650-00-872-0942
NSN 5930-00-617-9569
NSN 6685-00-625-7428
NSN 6320-01-154-1099
NSN 2925-01-213-6622
NSN 5945-00-155-4290
NSN 6685-01-106-2715
NSN 5910-00-864-5465
NSN 5895-01-490-1012