Abstract: An anchor bolt cap for the top ends of anchor bolts that extend upwardly out of a base foundation onto which is mounted the tower base of a wind generator that produces electricity by rotation of the blades of the wind generator. The bottom end of the tower base of the wind generator has an outer annular flange and an inner annular flange each having a plurality of apertures spaced from each around the entire periphery of the respective flanges. The anchor bolts pass upwardly through these respective apertures and have a washer and nut threaded onto each of the respective anchor bolts for locking the tower base to the top of the base foundation. The anchor bolt caps are installed over the top ends of the respective anchor bolts and prevent moisture from attacking the anchor bolts and thereby prevent corrosion of the anchor bolts.