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 5935-01-193-3038
NSN 5960-01-513-3230
NSN 5985-00-428-1379
NSN 5998-01-450-9235
NSN 5945-01-167-8498
NSN 6685-01-050-8391
NSN 6610-01-304-9914
NSN 6645-01-533-8408
NSN 5905-00-707-5032
NSN 5915-01-560-6795
NSN 6685-01-573-1563
NSN 5999-01-281-7525