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 5950-01-113-7834
NSN 6150-01-309-7482
NSN 2925-00-740-7029
NSN 5945-01-357-5841
NSN 6105-00-422-2714
NSN 5835-00-063-0390
NSN 6645-01-471-4960
NSN 5935-00-814-8171
NSN 5835-00-867-0291
NSN 6145-01-377-7764
NSN 6320-00-336-9123
NSN 6650-01-361-9336