The ornamental design for a flange-mounted blind-mated line replacement unit form factor, as shown and described.
FIG. 1 is a back perspective view of a flange-mounted blind-mated line replacement unit form factor showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a rear elevational view thereof; and,
FIG. 8 is a front perspective view thereof.
The broken lines shown depict the portions of the flange-mounted blind-mated line replacement unit form factor that form no part of the claimed design.