The Koyo 6004C3 Single Row Ball Bearing is designed for dependable performance in moderate radial and low axial load applications. Made from durable steel, it features a 0.7874 in (20 mm) round bore, 1.6535 in (42 mm) outer diameter, and 0.4724 in (12 mm) overall width. With a riveted steel cage, open closure, and C3 internal clearance, this single-row bearing provides smooth operation, stability, and long service life, making it a reliable choice for light to medium-duty machinery.