t6slotT-Slots, aluminum extrusions, and parts. Architectural solutions and frames for industrial machine guards, workstations, data center enclosures, and more. Build your idea with 8020Engineering 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-Slots