Apply a drop of oil to the tip of the threads on the three 30034 6-32 x 1.75"L Phillip Pan Head Screw - SS

Pass the pan head screws through the mounting holes on the heat spreader, then through the 84612 Bed Mounting Post (PEEK), the melamine frame of the printer, then the 30450 #6 SAE Flat Washer - SS with the three remaining 30164 nylon lock nuts