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 6685-01-281-8860
NSN 5935-00-100-6350
NSN 6220-01-456-0469
NSN 6145-00-435-9296
NSN 7035-00-541-8516
NSN 5960-01-328-5887
NSN 5905-01-031-8088
NSN 6645-00-033-8714
NSN 5835-00-187-1481
NSN 5910-00-965-9814
NSN 2925-00-982-0409
NSN 4140-01-428-2509