Shoulder Screw And Fasteners Design Overview; Back Plate - Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - THERMAL MECHANICAL SPECIFICATIONS AND DESIGN GUIDELINES 01-2011 Specifications

Independent Loading Mechanism (ILM)
Figure 4-2.

Back Plate

4.1.3

Shoulder Screw and Fasteners Design Overview

The shoulder screw is fabricated from carbonized steel rod. The shoulder height and
diameter are integral to the mechanical performance of the ILM. The diameter provides
alignment of the load plate. The height of the shoulder ensures the proper loading of
the IHS to seat the processor on the socket contacts. The design assumes the shoulder
screw has a minimum yield strength of 235 MPa.
A dimensioned drawing of the shoulder screw is available for local sourcing of this
component. Please refer to
drawing.
The standard fasteners can be sourced locally. The design assumes this fastener has a
minimum yield strength of 235 MPa. Please refer to
thread fasteners drawing.
Note: The screws for Server ILM are different from Desktop design. The length of Server ILM
screws are shorter than the Desktop screw length to satisfy Server secondary-side
clearance limitation.
Note: Unique part numbers, please refer to
Note: The reference design incorporates a T-20 Torx* head fastener. The Torx* head fastener
was chosen to ensure end users do not inadvertently remove the ILM assembly and for
consistency with the LGA1366 socket ILM.
Thermal/Mechanical Specifications and Design Guidelines
Assembly Assembly
Orientation Orientation
Feature Feature
Pierced & Extruded Pierced & Extruded
Thread Features Thread Features
Figure B-13 for the custom 6-32 thread shoulder screw
Figure B-14
Appendix A.
Die Cut Die Cut
Insulator Insulator
for the standard 6-32
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