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 5920-01-134-5033
NSN 5965-00-726-3168
NSN 5835-01-632-6627
NSN 5999-01-317-4135
NSN 6650-00-436-1526
NSN 6130-01-618-1735
NSN 6135-01-156-4627
NSN 6685-01-612-6254
NSN 5996-01-388-7618
NSN 5930-01-464-3106
NSN 6105-01-265-8693
NSN 5855-01-302-9778