The NTN 6904ZZC3/5K is a genuine NTN deep groove ball bearing, engineered for reliable performance in demanding industrial and agricultural machinery. This precision bearing features a 20mm inner diameter, 37mm outer diameter, and a 9mm width. It is equipped with two durable metal shields (ZZ) to effectively protect against dust and contaminants, extending bearing life. The C3 internal clearance provides greater than normal radial play, accommodating thermal expansion and minor misalignments, making it suitable for applications with varying temperature conditions or shaft deflections. The '5K' suffix indicates specific NTN manufacturing characteristics, often related to the cage material, ensuring robust operation.