The tire carrier is then lifted into place and carefully slid over its spindle. Next, the flat washer and 1-inch, 14 grade, all-metal lock nut are installed. The bolt should be tightened until it swings freely without friction or resistance, but without slop. The hinge cap and lock pin assembly are installed before the latch and knob. When these last parts are on the bumper, installation is complete and the spare tire can be mounted in place.