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 6145-01-103-3273
NSN 5855-01-299-3510
NSN 5999-01-243-4566
NSN 5960-01-283-2281
NSN 5835-01-565-3411
NSN 6130-00-514-1177
NSN 6130-01-470-9944
NSN 5945-01-157-9953
NSN 5990-01-626-3840
NSN 6685-00-890-8410
NSN 5965-01-396-7508
NSN 5925-00-517-0271