Table 34. Screws used in the printer Drawing and description Purpose Used to fasten metal to metal when good electrical contact is needed Phillips machine screw with captive star washer Self-tapping Phillips screw Used to fasten metal or plastic to plastic frames Used to fasten metal or plastic to threaded plastic or metal Phillips machine screw with lock and flat washer Used to anchor the tray 2 feed module assembly to the engine Long screw (116 mm/4.8 inches) Screw measurement guide EN Chapter 6 Removing and replacing parts 137