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 5925-01-103-4893
NSN 5998-00-483-9736
NSN 6220-01-510-4665
NSN 5975-01-056-4727
NSN 5950-01-184-0400
NSN 5998-01-617-6411
NSN 5930-01-339-3828
NSN 5905-01-200-5731
NSN 6685-01-380-4155
NSN 6130-01-374-5133
NSN 6650-00-442-0567
NSN 5975-00-012-3436