What screws are used on the sorting bin?

Do you have a picture of exactly what type of trash can?

The regular outdoor trash can is shown below, the lid is assembled using plastic pins, not screws.

The wheels and lid are assembled as follows, the wheels are assembled using steel rods.

The bottom of the trash can will be made of steel anti-friction nails.

Some of the footed trash cans will need screw processing, a trash can parameter chart is put below for reference.

Trash can lid and wheel assembly diagram

Trash can parameter diagram