closed-end crimp wire connectors

These are **closed-end crimp wire connectors** (also called **closed-end wire caps** or **crimp caps**).

**What they are:**

* Translucent nylon outer sleeve
* Metal crimp insert inside
* One end closed, the other open for wires

**What they’re used for:**

* Joining **two or more electrical wires** together
* Sealing the wire ends so no copper is exposed
* Common in **automotive wiring, appliances, HVAC, control panels**, and low-voltage electrical work

**How they work:**

1. Insert stripped wire ends into the open side
2. Crimp with pliers or a crimping tool
3. The metal core grips the wires; the nylon insulates and protects