| Qty | Unit price | Saving |
|---|---|---|
| 1+ | £0.10 | — |
| 5000+ | £0.06 |
Price isn't everything
This is a genuine SUMITOMO part. Cheaper copies sold under the same part number can look identical but may not seal, lock or carry current the same way.

The Component: Genuine Sumitomo OEM 2.3mm (090 series) connector cavity dummy plug / Solid cavity blanking seal insert / Universal 090 class waterproof terminal cavity plug / Precision-molded from oil- and heat-resistant Nitrile Butadiene Rubber (NBR) in factory brown / Component Part Number: 7161-9787 / Alternate OEM Identifiers: Sumitomo 7161-9787 / 71619787 / 090 Cavity Plug / 2.3mm Dummy Plug Brown / Sumitomo Blanking Seal / Wire Cavity Plug.
Applications & Fitment: Essential waterproofing accessory engineered to seal unpopulated 2.3mm (090) terminal cavities across Sumitomo TS Sealed, SL Sealed, DL Sealed, MT Sealed, and HW Sealed series connector housings. Used extensively in automotive, commercial vehicle, and motorcycle wiring looms (Toyota, Lexus, Honda, Nissan, Subaru, Mazda) where certain connector positions are unused in specific trim levels or harness options. Inserting a 7161-9787 dummy plug into an empty cavity ensures full IP67 ingress protection, preventing water, road salt, engine oil, fuel, and debris from bypassing the rear wire seal and causing internal terminal corrosion or short circuits. Essential stock for auto-electricians, harness repair specialists, Japanese vehicle technicians, and custom loom builders.
Technical Attributes:
- OEM Part Number: 7161-9787 / 71619787 (Manufacturer: Sumitomo Wiring Systems)
- Product Component Classification: Wire Cavity Dummy Plug / Single Wire Seal Blanking Plug
- Connector Family Compatibility: Sumitomo TS Sealed, SL Sealed, DL Sealed, MT Sealed, and HW Sealed Series
- Compatible Contact System Class: 2.3mm (090 Series) Cavities
- Function Profile: Seals Unused Connector Housing Cavities for IP67 Ingress Protection
- Structural Material Base: Nitrile Butadiene Rubber (NBR)
- Color Profile: Factory Solid Brown
- Thermal Operating Range: -40 to 125 degrees Celsius
- Chemical Resistance: Resistant to automotive fuels, oils, engine coolant, washer fluid, and road salt
- Commercial Procurement Status: Provided as an individual loose-piece cavity dummy plug. Main connector housings, crimp terminals, and active wire seals sold separately. Multi-tier trade volume discounts apply automatically at checkout.