Male Bullet Connectors with Heat Shrink Insulation (Red/Blue/Yellow)

These male bullet connectors with heat shrink insulation complete the quick-connect wiring system, allowing you to create environmentally resistant links that can be easily disconnected when needed. Each male connector is a metal pin with a bullet shape that inserts snugly into the corresponding female socket (see code 04369). When properly paired, the contact area is optimal, ensuring a stable electrical connection with minimal resistance.

After the wire is crimped into the tail of the pin, the heat-shrink tube (red/blue/yellow depending on size) is heated to fit tightly. This forms a protective layer that seals the open end of the pin and grips the wire, safeguarding them from water and air ingress. That means even if the connection lies in a wet bilge, a humid engine room, or under a car hood, it remains dry and corrosion-free.

Usage & Guidelines:

• Red bullet pins (R) – Designed for wires 0.5–1.5 mm², these small connectors are ideal for light circuits and accessories. For example, on small boats or jet skis (3–5 m) you might use them for connecting LED lights, small horns, or sensors that may need to be unplugged during service. Likewise, for motorcycles and scooters, red bullet connectors are suitable for indicator lights or auxiliary electronics where wires are thin.
• Blue bullet pins (BL) – For wires 1.5–2.5 mm², this is the most commonly used size for general electrical systems. Mid-sized boats (5–8 m) will benefit from blue connectors for hooking up navigation lights, bilge pumps, radios or fishfinder/sonar units – devices with moderate current draw. In automotive scenarios, blue pins are standard for audio systems, fog lights, trailer wiring, etc. They provide a reliable link capable of handling engine and road vibrations.
• Yellow bullet pins (Y) – For wires 4–6 mm², these connectors cater to higher-end installations on larger boats (8+ m), as well as heavy-duty or high-performance automotive applications. They are suitable for main feeds to auxiliary modules – for example, power lines to amplifiers, searchlight circuits, or other high-power devices where a quick connector is desired. On a bigger yacht, yellow bullet connectors can join segments of the 12/24V power system, allowing sections to be unplugged for service. They provide a stable contact for currents in the 30–40+ A range.
• Pairing with sockets: For optimal performance, always use male connectors together with the matching female sockets of the same color and size. This ensures the bullet pin fully inserts and locks within the spring elements of the socket. If you try to mix sizes (e.g. a yellow male with a blue female), the connection will not be tight and could separate or have poor electrical contact.
• During installation, ensure a firm crimp – a properly crimped pin should not twist or pull out from the wire. Heat the sleeve evenly to avoid creating air bubbles or charring. A correctly insulated link is one that even when submerged in water will not short out or show metal corrosion.
• System flexibility: The combination of male and female bullet connectors is often used for upgrading electrical systems – for example, you can insert an extension cable between two bullet connectors to quickly add an accessory and then remove it later if needed. This gives you the freedom to modify your boat or vehicle’s setup without constant soldering or wire cutting. It’s a plug-and-play approach to wiring modifications, invaluable for prototyping or seasonal equipment (like removable marine electronics or vehicle light bars).