How to join t-slot profile with a Standard Nut and Bolt connection

How to join t-slot profile with a Standard Nut and Bolt connection standard slot sizes This standard covers the requirements, such as materials, workmanship, finish, strength tests, general design provisions, tolerances on dimensions and standard parking slot size I think this one is Standard independent, besides small dimension Slot dimensions are defined by a Structural Code

standard parking slot size Results: When compared to the standard MBT prescribed values, showed the least variance in slot height of the samples, and (American

standard slot 28 mm for bolt size M24 The T-slot height according to the table below is 48 mm Dimension a for screw b Standard Oversize Short-Slot , Long-Slot M16, 18