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 5990-01-471-7858
NSN 6610-01-304-3226
NSN 6135-00-593-6831
NSN 6685-01-232-1979
NSN 5950-01-619-2718
NSN 5925-01-202-1381
NSN 5925-01-634-0664
NSN 6610-00-978-5133
NSN 6110-01-557-6932
NSN 5960-01-560-8461
NSN 7035-01-236-5743
NSN 6685-00-547-6218