Connectors & Terminals

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Expected delivery: Wed, Nov 18

Wire connectors and terminals for panel work, equipment repair, vehicle wiring and upfits. This section covers insulated and non-insulated crimp terminals (ring, fork, spade and quick-disconnect), butt splices, heat shrink terminals and splices, twist-on wire connectors, push-in and lever connectors, split bolts, mechanical and compression lugs, and terminal blocks. Most crimp terminals are tin-plated copper with vinyl, nylon or heat shrink insulation.

What to check before you order

  • Wire range. Insulated terminals are color coded: red for roughly 22 to 16 AWG, blue for 16 to 14 AWG, yellow for 12 to 10 AWG. Confirm the range printed on the package.
  • Stud or tab size. Ring and fork terminals are sized to the screw or stud, such as No. 8, No. 10 or 1/4 in. Quick-disconnects are sized to the tab width.
  • Insulation type. Heat shrink terminals with adhesive help seal out moisture in vehicles and outdoor equipment. Nylon holds up better than vinyl in heat.
  • Copper or aluminum. Lugs and connectors must be rated for the conductor material. Look for the AL/CU marking where aluminum is involved.
  • The right crimp tool. Use a tool and die made for the terminal type and follow the manufacturer's instructions.

Connections in building wiring and panels should be made by a qualified person to code. Fleet shops can see our line cards for upfit supplies. Related products are under wire and cable, cable ties and wire management and electrical.

Common questions

What is the difference between a butt splice and a wire nut?

A butt splice crimps two wires end to end. A twist-on wire connector joins wires inside a box in building wiring. Use each within its listed wire range.

What are lever wire connectors used for?

Lever connectors clamp each wire under its own lever, can be reopened, and often accept solid and stranded wire. Check the listed wire range.

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