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 5965-01-187-4008
NSN 5920-01-186-3953
NSN 5905-00-243-9520
NSN 5910-00-146-9466
NSN 4140-01-431-4330
NSN 6150-01-218-6019
NSN 5945-00-182-2869
NSN 6105-01-061-5471
NSN 5998-01-341-5654
NSN 5920-01-556-3033
NSN 7035-01-227-2546
NSN 6620-01-516-6282