We are installing an over the range microwave. In a plastic bag, there was a small screw and a piece of plastic with teeth like look. What is this plastic piece for? There was no installation instruction book with this microwave.
Answer Hello Judy,
The small "toothed" part is actually a plastic grommet for installation in a metal cabinet. It fits inside the drilled hole for the power wire to go through so the wires insulation doesn't get cut and shorted out. These have been included for years but seldom used. Metal cabinets went out in the 1970's.