The TE 828920-1 is a wire seal from the 2.5mm System series, designed as a dummy plug for circular connectors carrying 2 to 4 positions. Molded from silicone elastomer in gray, it seals an unused cavity in the connector housing — keeping moisture, dust, and debris out of the contact chamber when a wire is not present. This is a common requirement in sealed harness assemblies where every cavity must be plugged to maintain the connector's IP rating.
This seal is listed for use with circular connectors of 2 to 4 positions — the cavity diameter and retention geometry match that range. It is not a universal seal; confirm your connector housing is from the 2.5mm System family and accepts a wire seal of this type. The gray colour is a visual identifier that the cavity is plugged, not populated.
Material and Environment
Silicone elastomer holds up across a wide temperature range and resists compression set, meaning the seal stays in place and maintains its squeeze on the cavity wall through thermal cycling.