Based on this product's specifications, here are some alternatives and similar models
Cage nut M6, SCHROFF 21120131, pack of 10 pieces
Summary description:
Cage nut M6 SCHROFF 21120131 in a pack of 10 pieces. Designed for mounting M6 screws in equipment racks and panels where a captive nut is required. Provides secure threaded attachment for server cabinets, enclosures and electronic assemblies. Useful for rack installation, maintenance and retrofitting, offering reliable holding strength and easy replacement.