Crimp Connectors
Crimp connectors are terminals and joints that are fixed to a conductor by compressing a metal barrel with a crimping tool, creating a secure connection without solder. Our Unicrimp range includes pre-insulated ring terminals, butt connectors, male and female bullet connectors, fast-on tabs, piggyback tabs and fully insulated female tabs.
Bootlace ferrules from 0.5mm² to 6mm² finish stranded conductors for screw and spring terminals. Insulation is colour coded red, blue and yellow by conductor size. Shop at trade prices and get stock items delivered the next working day across NI and ROI if you order by 5pm.
Choosing the right crimp connector
Crimp terminals are used across panel building, automotive, control and appliance work. Selecting the correct type and size, and crimping with the right tool, gives a reliable connection every time.
Types of crimp connector
- Ring terminals fit over a stud or screw, giving a secure termination that cannot slip off if the screw loosens.
- Butt connectors join two conductors in line.
- Bullet connectors provide push-fit male and female connections that can be separated.
- Fast-on (spade) tabs connect to 6.3mm blade terminals on switches and appliances; piggyback tabs allow a second connection on the same terminal.
- Bootlace ferrules finish stranded conductors so they sit neatly in terminals.
Colour coding and sizing
Pre-insulated terminals follow a common colour code: red generally suits around 0.5 to 1.5mm² conductors, blue around 1.5 to 2.5mm², and yellow around 4 to 6mm². Bootlace ferrules use their own colour system, so check each product's stated size. The terminal's stud or tab size, such as 4mm, 5mm or 8mm rings or 6.3mm tabs, must also match the equipment.
Crimping correctly
Strip the conductor to the length of the barrel, insert fully and crimp with a ratchet tool that has the right colour-coded die. Give each crimp a pull test. Use proper tools from our strippers and crimp tools range rather than pliers, which can produce weak joints. Add heat shrink for extra strain relief or identification. For larger power cables, see our copper lugs.
Compliance
Crimped connections made with the correct tool are widely used in fixed wiring and equipment. Check current wiring regulations and the equipment manufacturer's instructions for terminal requirements.
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FAQ's
- What are Crimp Connectors?
- What is the purpose of Crimp Connectors?
- What should you consider before crimping cable?
- What Crimping Accessories are available?
- What do the red, blue and yellow colours on crimp terminals mean?
- When should I use bootlace ferrules?
- What is a piggyback tab used for?