I claim, the ornamental design for a key blade pins configuration, as shown and described.
FIG. 1 is a perspective view of a key blade pins configuration showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is an enlarged top plan view thereof;
FIG. 5 is an enlarged bottom plan view thereof;
FIG. 6 is a left side elevational view thereof; and,
FIG. 7 is a right side elevational view thereof.
The dashed lines in the drawing illustrate environmental structure and form no part of the claimed design. The break lines in FIGS. 1-3, 6 and 7 indicate undetermined length of the key blade. The portions between the break lines form no part of the claimed design.