Intel Socket 1155/1156 ILM Backplate

Replacement backplate for Sandy Bridge / Ivy Bridge motherboards. The CPU retention mechanism (AKA Independent Loading Mechanism) screws into this part.

The ILM is the arm & plate assembly which forces the processor evenly into the socket, ensuring reliable connectivity. Note that backplates for CPU heat sinks are designed to fit over the ILM backplate, providing either holes to allow longer ILM screws to poke through, or avoiding the fastener areas completely.

Why would you need this? Mainly, to use an aftermarket heat sink on an OEM system which has a non-reference backplate - in this example, one from a Dell workstation that integrates mounting arms for the stock cooler. Without this print, one would need to either source UNC #6-32 screws to fit their cooler, which may not be possible, or saw off the mounting arms (which destroys the ability to use the stock cooler again, hurting resale value.)