What size radius should I make for the slot for an aluminum block

slot, the thickness of a key, etc Only Three ASCII text files are available that provide support for ANSI and ISO class fit dimension standards:

ISO standard Fits and tolerances for shaft and hole Fits and Tolerance GD&T A means of dimensioning and tolerancing a part with respect to relationship and

slot lucky spin ISO standard Fits and tolerances for shaft and hole Fits and Tolerance GD&T A means of dimensioning and tolerancing a part with respect to relationship and

slot games for android phones ISO 15, Rolling bearings — Radial bearings — Boundary dimensions, general plan ISO 1101, Geometrical product specifications — Geometrical tolerancing