Butt splice connectors are a type of electrical connector that is used to connect or splice two or more electrical wires together. They are typically made of metal, such as copper or brass, and have a cylindrical shape with two openings at either end to insert the wires.

To use a butt splice connector, the wires to be joined are inserted into each end of the connector, and then crimped or compressed using a specialized tool. This creates a secure and reliable electrical connection between the wires, without the need for soldering.

Butt splice connectors are commonly used in automotive, marine, and industrial applications, as well as in home wiring projects. They come in various sizes and types, including insulated and non-insulated, and are typically rated for a specific range of wire gauges and amperage levels.

When selecting a butt splice connector, it is important to choose one that is appropriate for the intended application and wire size. The connector should also be properly crimped or compressed to ensure a secure and reliable connection.