The AF31FT is an industrial automation component with a listed description of N1 31 IN X 21.5 IN FSH FRONT. This describes the enclosure type and dimensions — a NEMA 1 (indoor use, general-purpose) enclosure measuring 31 inches by 21.5 inches with a flush front.
The N1 31 IN X 21.5 IN FSH FRONT enclosure is a standard NEMA 1 footprint, so panel cutouts and mounting patterns follow that common spec. No special adapter plates or non-standard hardware should be needed for replacement in an existing NEMA 1 installation.