Twidec/755PCS Car Electrical Wire Terminal Pins Connector

Twidec's 755-piece automotive connector kit supplies 21 sizes of male and female crimp pins plus waterproof plugs and a removal tool for reliable 12V electrical repairs and custom wiring harnesses.

This comprehensive set gathers common non-insulated terminal pins, seals and accessories into one organized case so you can rebuild connectors, replace damaged contacts or prototype wiring on cars, motorcycles, boats and utility vehicles. The pins are tinned copper for consistent conductivity and corrosion resistance, while the keyed latch design helps secure each contact inside housings for a snug, repeatable fit.

What parts and sizes are included in the kit?

The kit contains 755 pieces divided between 355 male and female terminal pins and 400 assorted waterproof plugs, plus an extraction tool. Sizes range across 1.0, 1.5, 1.8, 2.2, 2.8 and 3.5 mm to cover a wide variety of automotive connector families and wire gauges.

• 21 distinct pin types to match common 12V connectors
• 1.0–3.5 mm diameter options for different wire gauges
• 400 rubber waterproof seals for moisture protection
• An 18-pin extractor tool for safe contact removal

How do the materials and design affect performance?

Each terminal is made from tinned copper for improved electrical transfer and resistance to oxidation. The pre-formed latch (buckle) helps each pin snap into housings securely yet can be disengaged cleanly with the extractor tool, reducing the risk of damage during service.

• Tinned copper offers consistent conductivity and corrosion protection
• Precision crimp geometry ensures reliable mechanical and electrical connection
• Buckle design secures pins inside connector shells to prevent accidental pull-out
• Extractor tool prevents bending or tearing when removing contacts

Which vehicles and applications is this kit best suited for?

These non-insulated pins and seals are compatible with many 12V systems found in cars, trucks, motorcycles, scooters, marine craft and recreational vehicles. Use the kit for repairing factory harnesses, assembling custom pigtails, restoring vintage connectors, or building robotics and low-voltage prototypes.

• Automotive wiring repairs and connector restoration
• Motorcycles, ATVs, scooters and small engine electrical systems
• Boats and jet skis where waterproof seals are needed
• DIY harnesses, testing rigs and prototyping electronics

How do I use the kit to crimp and replace a terminal safely?

Strip the wire to the appropriate length, place the conductor in the pin’s crimp area, then use a quality crimping tool sized to the pin. After crimping, insert the contact into the matching housing until the latch engages; use the extractor tool to remove pins without damaging the connector if needed.

• Strip wire to the manufacturer-recommended length per pin size
• Use a matched ratchet or hand crimper for consistent crimps
• Slip a rubber seal over the wire before inserting the pin for waterproofing
• Confirm secure latch engagement and test continuity before reassembly

Who is this for: technicians, hobbyists and vehicle owners who need a broad, ready-to-use selection of reliable crimp pins and seals for 12V wiring work. If you maintain multiple vehicle types, restore older wiring, or build custom harnesses, this Twidec kit supplies the variety and tools to get the job done without multiple parts orders.