The TE Connectivity 2355151-1 is a silicone rubber seal, not a connector body or terminal. It is the wire-seal component that fits inside the cavity of a sealed connector housing, wrapping around the wire insulation to block moisture and contaminants from entering the contact cavity. The blue colour is a visual cue for line-side sorting during harness assembly — a common practice in high-mix build environments where multiple seal sizes run on the same station.
Compatibility: Deutsch DTM and DT Connectors
This seal is designed for use with Deutsch DTM and DT series connectors — the same cavity geometry and wire diameter range. If you are building a Deutsch DTM or DT harness and need the wire-seal element for the 20-22 AWG or 16-18 AWG cavity positions, this is the part that goes on the wire before the terminal.