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 6145-01-596-1221
NSN 6620-01-250-1692
NSN 7035-01-350-4247
NSN 6135-00-932-3136
NSN 5965-00-552-9636
NSN 6240-00-006-1902
NSN 6645-01-210-8180
NSN 6220-00-901-6318
NSN 2925-00-055-9601
NSN 5930-00-808-6544
NSN 5895-00-580-0842
NSN 5910-00-688-7580