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 5835-01-297-1909
NSN 6240-01-558-8377
NSN 6105-01-162-5986
NSN 5985-00-295-2522
NSN 5930-00-908-2289
NSN 5999-00-216-7431
NSN 4140-01-320-4896
NSN 5835-01-219-0586
NSN 6220-01-525-5956
NSN 5925-00-369-7747
NSN 4140-01-307-1104
NSN 6685-00-833-6132