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A-A-50227 1986 Edition, October 29, 1986
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T-SQUARES (METAL, WOOD, AND PLASTIC)
Includes all amendments and changes through Validation Notice 3, March 5, 2007
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The General Services Administration has authorized the use of this commercial item description in preference to Military Specification MIL-T-10629.

This description covers wood and plastic T-squares used in general drafting practice and layout work and allows for ordering of a metal construction where a heavy and rigid T-square is desired.