DHR (DIN 472-Heavy Type) Internal Reinforced, Housing Ring-Axially Assembled, METRIC
The "DHR" is a thicker version of the "DHO" that features a larger radial width than this ring. Once it is installed in the groove pf a housing/bore, the portion of the ring protruding from the groove (or shoulder) hold an assembly in place. For sizes and other information please see the following catalog pages: