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 5910-01-494-2734
NSN 5990-01-384-2697
NSN 6320-00-519-0770
NSN 4140-01-065-7563
NSN 6650-00-740-7338
NSN 5935-00-280-3116
NSN 6240-00-170-5302
NSN 6105-01-597-1078
NSN 5935-01-068-5312
NSN 5975-01-260-7270
NSN 5999-01-143-3633
NSN 5855-01-335-8907