620310ZZE Nachi Bearing Shielded C3 0.625 inch ID 5/8" x 40x12 Bearing620310ZZE Nachi Shielded Ball Bearing 5 8" inch x 40mm x 12mm Made in Japan 620310ZZE Nachi Bearing, the 620310ZZE inner diameter is 5 8" inch, the 620310ZZE outer diameter is 40mm, 620310ZZE width is 12mm. Made in Japan 620310ZZE Nachi Ball Bearing Nachi Deep groove Ball Bearing Closures: Double metal shields (Z ZZ 2Z) for protection against dust and debris Radial Clearance: C3 Dimensions: 5 8" inch x 40mm x 12mm ID (inner diameter) Bore: 5 8" inch