ISO 10317:2008

ISO 10317:2008 establishes a system for the designation of metric size tapered roller bearings produced in accordance with ISO 355.
The system covers designations for single-row bearings, double-row bearings, and bearings with flanged outer rings. ISO 10317:2008 also establishes designations for separate inner subunits (inner ring, tapered rollers and cage) and outer rings of such bearings.
ISO 10317:2008 does not apply to bearings or inner subunits or outer rings which in any respect deviate from ISO 355.