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 5910-01-461-3439
NSN 6105-01-398-1674
NSN 6320-01-323-7565
NSN 6240-00-013-1282
NSN 6610-01-141-7014
NSN 6610-00-018-5141
NSN 5960-01-014-1595
NSN 6220-00-236-8333
NSN 5945-01-463-8489
NSN 5996-01-312-3508
NSN 5910-00-188-9624
NSN 5975-01-061-6460