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 6685-01-522-4294
NSN 5835-01-100-3265
NSN 5950-01-619-5055
NSN 6685-01-574-2122
NSN 6240-01-118-6398
NSN 5895-01-538-6998
NSN 5960-01-143-1202
NSN 6150-01-207-1411
NSN 6110-00-725-9740
NSN 6650-01-222-1749
NSN 5930-01-455-5508
NSN 6135-01-383-0151