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A-A-843 Revision E, June 17, 1993
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T-SQUARE: (WOOD, WOOD AND PLASTIC, STEEL AND PLASTIC)
Includes all amendments and changes through Cancellation Notice 1, September 30, 1999
Additional Comments: CNCL NO S/S
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The General Services Administration has authorized the use of this commercial item description as a replacement for Federal Specification GG-T-711F.

This description covers fixed head T-squares for general drafting practice, type, size and class as specified:
Type I -  Fixed head.
Type II - Double head. (fixed and adjustable).

Class B - Opaque blade. With transparent edges, the blade
          shall be one continuous piece of hardwood or opaque
          plastic with continuous transparent working edges
          between 6 and 12 millimeters wide.

Class C - Transparent blade. One continuous piece of plastic
          with a flat black metal slat permanently bonded to
          both surfaces. Available in 75 centimeter lengths
          or greater.