The 60800-123 is a Coding Peg for use with Schroff 19-inch AC/DC switched-mode power supplies. Mechanical keying/coding prevents a power supply (PSU) being fitted on the wrong slot, space requirement 4 HP. With 2 coding pins there are 66 coding possibilities. Connector keying/coding with a comb strip (Item 2, applied at power supply - slimpower, maxpowerPRO) and contact strip (assembly at the horizontal rail).