INSULATED FORK LUG | 1.5MM – 6MM

Insulated Fork Lug | 1.5mm – 6mm

Insulated Fork Lug | 1.5mm – 6mm

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Insulated fork lugs are crimpable electrical connectors used for secure, removable wire-to-terminal connections in automotive, industrial, and household wiring. They feature a forked tongue for easy screw mounting and a plastic insulator for safety.






???? Key Features


✅ Material:





  • Terminal: Copper (often tin-plated for corrosion resistance).




  • Insulation: PVC or nylon (color-coded by size).
    ✅ Sizes:




  • Wire Range: 1.5mm² – 6mm² (~16–10 AWG).




  • Hole Size (for screw): Typically M3, M4, M5, or M6.
    ✅ Voltage Rating: Usually up to 600V.
    ✅ Temperature Range: -40°C to +105°C (depends on insulation).







???? Common Applications




  • Automotive wiring (battery terminals, fuse boxes).




  • Industrial control panels (relays, contactors).




  • Home appliances & electrical repairs.




  • Solar power systems (DC connections).







???? How to Crimp Insulated Fork Lugs?




  1. Strip the wire (~8–10mm).




  2. Insert wire into the lug barrel.




  3. Crimp using a ratchet crimper (e.g., HX50B or hydraulic crimper).




  4. Tug test to ensure a secure connection.




  5. Mount under a screw terminal (no soldering needed).




⚠ Warning:





  • Never solder only—crimping is required for mechanical strength.




  • Match lug size to wire gauge (1.5mm² for thin wires, 6mm² for thicker).







???? Fork Lug vs. Other Connectors

































Type Pros Cons
Fork Lug Removable, secure, insulated Requires crimping
Ring Lug More vibration-resistant Harder to remove
Spade Lug Quick disconnect Less secure under vibration
Butt Connector Permanent splice Not for screw terminals





???? Sizing Guide (Wire vs. Lug)

































Wire Size (mm²) AWG Equivalent Typical Fork Lug Color
1.5mm² 16 AWG Red
2.5mm² 14 AWG Blue
4mm² 12 AWG Yellow
6mm² 10 AWG Black/Gray





???? Where to Buy?




  • Amazon (Search "insulated fork lug 1.5-6mm").




  • Auto parts stores (for automotive use).




  • Electrical suppliers (e.g., RS Components, Grainger).







???? FAQ


❓ Can I use uninsulated fork lugs?
→ Yes, but add heat shrink tubing for insulation.


❓ Are fork lugs reusable?
→ No, but the screw terminal connection is removable.


❓ What crimper should I use?
→ Ratchet crimper (HX50B) for 1.5–6mm², hydraulic crimper for larger wires.





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