What are Bullet Connectors?

Meet the Connector: Bullet Connectors

Bullet connectors are widely used for simple, impermanent electrical connections in automotive and transportation applications as well as HVAC, entertainment systems, and lighting.

Molex bullet connector available from DigiKey, Avikrimp Snap Plug, 18-22 AWG

Bullet connectors are a simple wire connector named for its compact, circular form factor. They are commonly specified for impermanent electrical connections in automotive and transportation applications such as connecting ESC wires to motors, as well as HVAC, entertainment systems, RC applications, and lighting. They are an alternative to soldering that creates a secure connection in situations where connections may need to be changed for adjustments or maintenance, or for temporary installations.

They are widely used in automotive and transportation applications, such as to connect ESC wires to motors They are small, typically 2-5 mm in size, although they do add a minute amount of weight compared to soldering, so they are mainly used for impermanent connections.

Design Notes:

Mounting type or types: Female and male pole-type connectors are mated together or by inserting the stripped wires into the connector and crimping the terminal.

Dimensions: Bullet connectors are available in a variety of sizes. To specify, sizing must correspond to the selected wires’ AWG size.

Available from Waytek, 3M 82M-156-NB-A 4 mm Bullet Connector, Nylon Insulated

Material specifications:

Brass, tin- or gold-plated copper

Typically includes a nylon or polyvinyl insulating sleeve, which aids in handling and identification through color coding

Physical properties:

Insulation: Typically insulated with nylon or polyvinyl materials

Temperature range: 221°F (105°C)

Voltage: AC/DC up to 300 VDC

Markets and Applications 

Automotive, Transportation, Industrial

Automotive and transportation applications as well as HVAC, entertainment systems, remote control vehicles, and lighting.

Suppliers 

Bullet connectors are available in many variations from many suppliers, including DigiKey, Molex, Waytek

Like this article? Check out our other Meet the Connector and Connector Basics articles, our Transportation Market Page, and our 2025 Article Archives. 

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