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. 534-581
BrandRS PRO
£0.067
Each (In a Pack of 100)
Units
- - Insulated PVC 4.16mm 8mm 2.5mm² 1.5mm² 14AWG 16AWG M4 Blue Copper Tin
RS Stock No. 534-581A
BrandRS PRO
£0.019
Each (In a Pack of 1000)
Units
- - Insulated PVC 4.16mm 8mm 2.5mm² 1.5mm² 14AWG 16AWG M4 Blue Copper Tin
RS Stock No. 531-037
BrandRS PRO
£0.25
Each (In a Pack of 25)
Units
- - Uninsulated - 8.4mm - 10mm² - - - M8 - Copper Tin
RS Stock No. 241-4631
BrandRS PRO
£0.918
Each (In a Pack of 10)
Units
- - Uninsulated - 8mm - 35mm² - - - M8 - Copper Tin
RS Stock No. 531-071
BrandRS PRO
£0.54
Each (In a Pack of 10)
Units
- - Uninsulated - 8.4mm - 25mm² - - - M8 - Copper Tin
RS Stock No. 613-9312
BrandRS PRO
£3.34
1 Pack of 100
Pack(s)
- - Insulated Vinyl 5.3mm 8.5mm 2.5mm² 1.5mm² 14AWG 16AWG M5 Blue Copper Tin
RS Stock No. 613-9249
BrandRS PRO
£7.77
1 Pack of 100
Pack(s)
- - Insulated Vinyl 4.3mm 6.6mm 1.5mm² 0.5mm² 16AWG 22AWG M4 Red Copper Tin
RS Stock No. 149-530
BrandRS PRO
£12.17
1 Reel of 500
Reel(s)
3130 - Insulated Vinyl 5.3mm 9.5mm 6mm² 4mm² 10AWG 12AWG M5 (#10) Yellow Copper Tin
RS Stock No. 534-446
BrandRS PRO
£0.127
Each (In a Pack of 100)
Units
- - Insulated PVC 5.3mm 9.5mm 6mm² 2.5mm² 10AWG 12AWG M5 Yellow Copper Tin
RS Stock No. 531-885
BrandRS PRO
£9.52
1 Pack of 10
Pack(s)
- - Uninsulated - 10.4mm - 35mm² - - - M10 - Copper Tin
RS Stock No. 119-160
BrandRS PRO
£0.154
Each (In a Pack of 25)
Units
- - Uninsulated - 6.4mm - 6mm² - - - M6 - Copper Tin
RS Stock No. 531-065
BrandRS PRO
£0.629
Each (In a Pack of 10)
Units
- - Uninsulated - 6.4mm - 25mm² - - - M6 - Copper Tin
RS Stock No. 613-9328
BrandRS PRO
£0.107
Each (In a Pack of 100)
Units
- - Insulated Vinyl 6.4mm 12mm 2.5mm² 1.5mm² 14AWG 16AWG M6 Blue Copper Tin
RS Stock No. 613-9508
BrandRS PRO
£3.34
1 Pack of 100
Pack(s)
- - Insulated Vinyl 4.3mm 8.5mm 2.5mm² 1.5mm² 14AWG 16AWG M4 Blue Copper Tin
RS Stock No. 613-9283
BrandRS PRO
£16.82
1 Pack of 100
Pack(s)
- - Insulated Vinyl 8.4mm 15mm 6mm² 4mm² 10AWG 12AWG M8 Yellow Copper Tin
RS Stock No. 208-2537
BrandRS PRO
£16.04
1 Pack of 100
Pack(s)
- - Insulated PVC 10mm 15mm 6mm² 2.5mm² 10AWG 12AWG M10 Yellow Copper Tin
RS Stock No. 208-2509
BrandRS PRO
£0.155
Each (In a Pack of 100)
Units
- - Insulated PVC 8.4mm 12mm 2.5mm² 1.5mm² 14AWG 16AWG M8 Blue Copper Tin
RS Stock No. 149-546
BrandRS PRO
£31.28
1 Reel of 500
Reel(s)
3130 - Insulated Vinyl 4.3mm 9.5mm 6mm² 4mm² 10AWG 12AWG M4 (#8) Yellow Copper Tin
RS Stock No. 534-452
BrandRS PRO
£0.134
Each (In a Pack of 100)
Units
- - Insulated PVC 4.3mm 9.5mm 6mm² 2.5mm² 10AWG 12AWG M4 Yellow Copper Tin
RS Stock No. 534-222
BrandRS PRO
£4.99
1 Pack of 100
Pack(s)
- - Insulated PVC 3.7mm 6.6mm 1.5mm² 0.5mm² 16AWG 22AWG M3.5 Red Copper Tin
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