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 6150-01-302-7210
NSN 5835-01-452-7081
NSN 5925-01-464-1195
NSN 5998-01-044-2035
NSN 5960-01-544-1273
NSN 5998-01-385-4694
NSN 2925-00-101-7972
NSN 6150-00-498-5144
NSN 6135-01-246-0308
NSN 6110-01-449-3181
NSN 6110-00-248-2942
NSN 5975-01-546-7842