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 7035-01-160-0486
NSN 6320-01-150-5378
NSN 5835-01-125-2558
NSN 6110-00-950-3058
NSN 5996-01-363-1106
NSN 6620-01-220-8579
NSN 5985-01-403-2835
NSN 5925-01-435-8967
NSN 7035-01-048-7122
NSN 6240-00-155-8714
NSN 5930-00-109-7329
NSN 7035-01-567-9254