Fork Terminals

A crimp spade terminal, also known as a fork or split ring is a short metal tube with flat fork attached. The tube or barrel end of the crimp is a hollow tube where the stranded wire is inserted and crimped. The contact or connection end is a flat fork with a central hole which connects to a stud or bolt. Ring terminals are insulated or non-insulated.

What do fork terminals do?

An electrical crimp is a solderless electrical connection. Fork terminals are used to connect wiring to screws and studs.

What can you use fork terminals for?

  • Electrical panels

  • Terminal blocks

  • Wiring harnesses


Crimp terminals are available in a wide variety of ring sizes and wire sizes. The CSA (cross sectional area) or AWG (American wire gauge) of the stranded wire is the most critical. The size of the stranded wire must be adequately matched to meet the amperage. The size of the fork is matched to the bolt or stud size, usually in a metric measurement.

Insulated Terminals

DIN 46237 colour coding is the most popular type of crimp terminal. Colour coding is used to denote a wire size.

  • Red 0.5 mm² to 1.5 mm²

  • Yellow 2.5 mm² to 6 mm²

  • Blue 1.5 mm² to 2.5 mm²

Other colours by different manufactures are now available.


Non-insulated terminals are bigger terminals. Non-insulated terminals connect to bigger studs and bolts. Non-insulated fork terminals have the capacity to except larger stranded wire. More specialised tooling is required for these heavy-duty terminals.

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Description Price Series Insulation Insulation Material Width Minimum Wire Size mm² Maximum Wire Size mm² Minimum Wire Size AWG Maximum Wire Size AWG Shrouded/Unshrouded Stud Size Colour Contact Plating Overall Length Contact Material
RS Stock No. 190-3335
Mfr. Part No.3240038
Each (In a Bag of 100)
C-FCI 2.5/M3.5 Insulated - 5.7mm 1.5mm² 2.5mm² - - Unshrouded M3.5 Blue - 22.5mm -
RS Stock No. 804-6962
Mfr. Part No.3240038
C-FCI 2.5/M3.5 Insulated - 5.7mm 1.5mm² 2.5mm² - - Unshrouded M3.5 Blue - 22.5mm -
RS Stock No. 804-6969
Mfr. Part No.3240034
Each (In a Pack of 100)
C-FCI 1.5/M4 Insulated - 7.2mm 0.5mm² 1.5mm² - - Unshrouded M4 Red - 22mm -
RS Stock No. 804-6966
Mfr. Part No.3240039
Each (In a Pack of 100)
C-FCI 2.5/M4 Insulated - 7.2mm 1.5mm² 2.5mm² - - Unshrouded M4 Blue - 22.5mm -