<h2>Basic Info.</h2> <table> <tr><td>Inner Diameter</td><td>5 mm</td></tr> <tr><td>Outer Diameter</td><td>21 mm</td></tr> <tr><td>Thickness</td><td>6 mm</td></tr> <tr><td>Material</td><td>Bearing Steel</td></tr> <tr><td>Sliding Contact</td><td>Steel-on-Steel</td></tr> <tr><td>Product Type</td><td>Spherical Plain Bearing</td></tr> </table> <h2>Description</h2> High-precision spherical plain bearing with long life and low noise. Designed for demanding applications requiring reliable steel-on-steel sliding contact. Compact specification (5×21×6 mm), OEM/ODM supported, made in China.