An instrument primarily used in drafting, consisting of two joined arms, one end being secured to a stationary surface and the other end equipped with an adjustable protractor and removable ruled scale(s); or two rigid beams, one beam anchored across full length of top of drawing board, the other beam perpendicular to top beam equipped with adjustable protractor and removable ruled scale(s). It is used as a guide for drawing parallel lines at any angle on a chart or drawing, or transmitting reference points.
Classification: Drafting tables and machines, whether or not automatic
NSN 5950-00-051-8296
NSN 6240-01-200-7937
NSN 5965-01-618-3707
NSN 5985-01-104-5288
NSN 5920-01-340-4506
NSN 6685-01-422-2229
NSN 5910-01-364-7702
NSN 7035-01-026-6602
NSN 4140-01-459-7411
NSN 5945-01-350-8652
NSN 4140-00-245-0799
NSN 6130-01-586-3619