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 2925-01-556-0333
NSN 5950-01-423-4236
NSN 5998-01-528-6940
NSN 5895-01-532-3716
NSN 2925-01-055-7607
NSN 5975-01-196-5842
NSN 6220-00-101-8799
NSN 6130-01-258-5642
NSN 6650-01-085-6088
NSN 5835-01-060-8123
NSN 5905-01-457-6592
NSN 5920-00-614-4643