Ring Terminals

A ring terminal is a short metal tube with flat washer type ring 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 ring with a central hole which connects to a stud or bolt. Ring terminals are insulated or non-insulated.


What does it do?


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


Where are they used?



  • Electrical panels 

  • Terminal blocks

  • Wiring harnesses


Types of Ring Terminal


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 ring 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 mm

  • Yellow 2.5 mm² to 6 mm

  • Blue 1.5 mm² to 2.5 mm


Other colours are available.


Non-insulated


Non-insulated terminals are bigger terminals. Non-insulated terminals connect to bigger studs and bolts. Non-insulated ring 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 Series Number Insulation Insulation Material Inner Ring Diameter Outer Ring Diameter Maximum Wire Size mm² Minimum Wire Size mm² Maximum Wire Size AWG Minimum Wire Size AWG Stud Size Colour Contact Material Contact Plating
RS Stock No. 604-8165
Mfr. Part No.2-M4
BrandJST
SGD15.50
1 Bag of 100
Bag(s)
- - Uninsulated - - - 2.6mm² 1mm² 14AWG 16AWG 4mm - - -
RS Stock No. 604-8070
Mfr. Part No.0.5-3
BrandJST
SGD10.56
1 Bag of 100
Bag(s)
- - Uninsulated - - - 0.5mm² 0.2mm² 22AWG 26AWG 3mm - - -
RS Stock No. 604-8115
Mfr. Part No.1.25-8
BrandJST
SGD12.09
1 Bag of 100
Bag(s)
- - Uninsulated - - - 1.65mm² 0.25mm² 16AWG 22AWG 8mm - - -
RS Stock No. 602-7512
Mfr. Part No.1.25-M4
BrandJST
SGD7.32
1 Bag of 100
Bag(s)
- - Uninsulated - - - 1.65mm² 0.25mm² 16AWG 22AWG 4mm - - -
RS Stock No. 161-7852
Mfr. Part No.1.25-5
BrandJST
SGD39.74
1 Box of 1000
Box(es)
R - Uninsulated - 5.3mm 8mm 1.65mm² 0.25mm² 16AWG 22AWG 5mm - - -
RS Stock No. 838-8254
Mfr. Part No.1.25-5
BrandJST
SGD0.044
Each (In a Pack of 100)
units
R - Uninsulated - 5.3mm 8mm 1.65mm² 0.25mm² 16AWG 22AWG 5mm - - -
RS Stock No. 838-8229
Mfr. Part No.N1.25-4A
BrandJST
SGD0.181
Each (In a Pack of 100)
units
R - Insulated Nylon 4.3mm 8mm 1.65mm² 0.25mm² 16AWG 22AWG 4mm Red - -
RS Stock No. 190-3502
Mfr. Part No.N1.25-4A
BrandJST
SGD0.158
Each (In a Pack of 500)
units
R - Insulated Nylon 4.3mm 8mm 1.65mm² 0.25mm² 16AWG 22AWG 4mm Red - -
RS Stock No. 166-7197
Mfr. Part No.14-20
BrandJST
SGD1.321
Each (In a Box of 100)
units
R - Uninsulated - 21mm 31.6mm 16.78mm² 10.5mm² 6AWG 6AWG 20mm - - -
RS Stock No. 604-8389
Mfr. Part No.R5.5-5
BrandJST
SGD10.84
1 Bag of 100
Bag(s)
- - Uninsulated - - - 6.6mm² 2.6mm² 10AWG 12AWG 5mm - - -
RS Stock No. 838-8333
Mfr. Part No.14-20
BrandJST
SGD1.856
Each (In a Pack of 10)
units
R - Uninsulated - 21mm 31.6mm 16.78mm² 10.5mm² 6AWG 6AWG 20mm - - -
RS Stock No. 604-8317
Mfr. Part No.R2-3.5
BrandJST
SGD7.61
1 Bag of 100
Bag(s)
- - Uninsulated - - - 2.6mm² 1mm² 14AWG 16AWG 3.5mm - - -
RS Stock No. 604-8272
Mfr. Part No.8-4
BrandJST
SGD27.60
1 Bag of 100
Bag(s)
- - Uninsulated - - - 10.5mm² 6.6mm² 8AWG 8AWG 4mm - - -
RS Stock No. 838-8317
Mfr. Part No.8-6
BrandJST
SGD0.351
Each (In a Pack of 50)
units
R - Uninsulated - 6.4mm 12mm 10.5mm² 6.6mm² 8AWG 8AWG 6mm - - -
RS Stock No. 166-7580
Mfr. Part No.5.5-6
BrandJST
SGD0.15
Each (In a Box of 500)
units
R - Uninsulated - 6.4mm 12mm 6.6mm² 2.6mm² 10AWG 12AWG 6mm - - -
RS Stock No. 166-7510
Mfr. Part No.8-6
BrandJST
SGD0.256
Each (In a Box of 500)
units
R - Uninsulated - 6.4mm 12mm 10.5mm² 6.6mm² 8AWG 8AWG 6mm - - -
RS Stock No. 166-7460
Mfr. Part No.FVWS1.25-8(LF)
BrandJST
SGD138.92
1 Box of 1000
Box(es)
FV - Insulated Vinyl 8.4mm 11.6mm 1.65mm² 0.25mm² 16AWG 22AWG M8 (5/16) Red - -
RS Stock No. 604-8323
Mfr. Part No.R2-4
BrandJST
SGD7.58
1 Bag of 100
Bag(s)
- - Uninsulated - - - 2.6mm² 1mm² 14AWG 16AWG 4mm - - -
RS Stock No. 838-8308
Mfr. Part No.5.5-6
BrandJST
SGD0.249
Each (In a Pack of 100)
units
R - Uninsulated - 6.4mm 12mm 6.6mm² 2.6mm² 10AWG 12AWG 6mm - - -
RS Stock No. 688-1183
Mfr. Part No.FVWS1.25-8(LF)
BrandJST
SGD0.173
Each (In a Pack of 100)
units
FV - Insulated Vinyl 8.4mm 11.6mm 1.65mm² 0.25mm² 16AWG 22AWG M8 (5/16) Red - -