Crimps, Splices & Terminals

A reliable connection starts with the right crimp terminal. We stock the full range — ring, spade, blade and fork terminals, bootlace ferrules, and butt, bullet and splice connectors.

Our own brand, TruComponents, has a crimp terminal for every job — insulated and uninsulated, colour-coded by wire size, spec-matched to the branded parts for less. In UK stock for next-day delivery, with technical back-up when you need it. Explore all of our own brands today.

Crimp terminals & connectors — buying guide & FAQs

Crimp terminals and connectors join wires quickly and reliably without soldering. The right one depends on the terminal type, the wire size and whether you need it insulated. For the detail, see our guide on what makes a good crimp.

What types of crimp terminal are there?

• Ring terminals — a closed ring for a secure stud or screw connection.
• Spade, blade and fork terminals — quick-connect and push-on tabs.
• Bootlace ferrules — sleeve stranded wire for a firm grip in terminal blocks.
• Butt, bullet and splice connectors — join wires end to end or inline.
• Solder tags and crimp kits for the bench and the toolbox.

How do I choose a crimp terminal?

• Terminal type — ring, spade, fork, butt or ferrule, to suit the connection.
• Wire size — colour-coded: red (0.5–1.5mm²), blue (1.5–2.5mm²), yellow (4–6mm²).
• Stud or tab size — match the ring or spade to the screw or terminal.
• Insulated or uninsulated — insulated for general wiring, uninsulated where you add your own sleeving.

Need the tool to fit them? See our crimping tools. Not sure which to specify? Our technical team will help, and we supply bespoke quantities when a project needs them.

TruComponents — crimp terminals for every job

Our own TruComponents range covers the crimp terminals you reach for daily — ring, spade, fork, butt and bootlace ferrules, insulated and uninsulated — matched to the branded parts on size and rating, and priced to keep a job affordable. Held in UK stock, with technical support from people who know the products.

These sit within our wider connectors range; see also our guide to spade connectors.

Crimp terminals & connectors — frequently asked questions

What is a bootlace ferrule?

A bootlace ferrule is a metal sleeve crimped onto the end of a stranded wire, so the strands stay together and grip firmly in a terminal. It gives a neat, reliable connection and is standard practice in control panels and terminal blocks.

What do the crimp terminal colours mean?

The insulation colour codes the wire size the terminal accepts: red for roughly 0.5–1.5mm², blue for 1.5–2.5mm², and yellow for 4–6mm². Match the colour to your conductor for a secure crimp.

What is the difference between a butt connector and a splice connector?

A butt connector joins two wires end to end in a single sleeve. A splice or inline connector also joins wires but can tap into a run or link several conductors. Both are crimped; some are heat-shrink or gel-filled for sealing.

Do I need insulated or uninsulated crimp terminals?

Insulated terminals have a coloured sleeve that protects the joint and codes the wire size, ideal for general wiring. Uninsulated terminals suit high-density or high-temperature work where you add your own sleeving or heat shrink.

How do I crimp a terminal properly?

Strip the wire to the right length, insert it fully into the barrel, and crimp with the matching ratchet tool until it releases. A good crimp grips the conductor tightly with no loose strands and passes a firm tug test.