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 5895-01-419-3700
NSN 5905-00-443-9090
NSN 5925-01-415-6551
NSN 5998-00-166-8135
NSN 6650-01-375-8207
NSN 6150-01-571-3434
NSN 6130-00-458-4585
NSN 6130-01-314-5274
NSN 6105-00-753-7495
NSN 6320-01-247-0898
NSN 2925-01-510-9378
NSN 6610-01-115-0391