2.938 Inch | 74.625 Millimeter x 4.875 Inch | 123.83 Millimeter x 3.5 Inch | 88.9 Millimeter REXNORD KPS521506 Pillow Block Bearings

Pillow Block Bearings HUB CITY BEARING CORP 2.938 Inch | 74.625 Millimeter x 4.875 Inch | 123.83 Millimeter x 3.5 Inch | 88.9 Millimeter offers a 2.938 Inch | 74.625 Millimeter x 4.875 Inch | 123.83 Millimeter x 3.5 Inch | 88.9 Millimeter REXNORD KPS521506 Pillow Block Bearings selection of Genuine Pillow Block Bearings at Wholesale Prices. We are a 2.938 Inch | 74.625 Millimeter x 4.875 Inch | 123.83 Millimeter x 3.5 Inch | 88.9 Millimeter REXNORD KPS521506 Pillow Block Bearings Certified Parts Retailer

What is KPS521506 bearing interchange？