<p>Means for highly efficiently obtaining a mechanical seal ring having concave-lens-shaped micropits of 5 to 30 µm diameter and 0.01 to 0.3 depth/diameter ratio with a configuration of high load capacity uniformly dispersed on a sliding surface of mechanical seal. Micropits being close to an ideal state for sustaining of fluid lubrication are formed only by subjecting a poreless hard material having a self-lubricating substance dispersed therein to regular mirror working without any special secondary working.</p>
