t6slotEngineering Hardware Standards. Dimension Table for T-Slots, Bolts, and Nuts per. American National Standard T-Slots ANSIASME B5.1M-1985. 1. Width of tongue used with the T-SlotsAluminum 6063 T-slot Extrusions offer several advantages over other materials such as steel or ey are lhtweht, durable, and resistant to corrosion, making them ideal for use in