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 5920-01-386-8116
NSN 6150-01-364-0545
NSN 5895-00-290-6501
NSN 6135-00-613-1068
NSN 6145-01-520-3631
NSN 6145-01-160-7658
NSN 6105-01-043-6768
NSN 5835-00-071-5739
NSN 5925-00-275-7599
NSN 5855-01-179-2702
NSN 5990-01-548-3711
NSN 6610-00-069-4484