Technifast stock a large range of Retaining Pins (R-Clips) in wire diameters from 1.2mm through to 8mm to meet the requirements of a large range of applications. Choose from a single coil - or for more durability a double coil R-Clip will spread the stresses out more evenly for a longer life cycle. Retaining clips are also known as spring cotters are often used in conjunction with clevis pins when inserted through the shaft, to keep the pin in place.

R-Clips are particularly useful when components are to be quickly assembled or disassembled and are used in a variety of industries including automotive and agriculture.

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Retaining Pin Size Chart - Find The Correct Pin

Diameter 'd'  Diameter 'H' Overall Length 'L' Recommended Hole Diameter Range Of Shaft Diameter Coil
1.2mm 2mm 22mm 1.5mm 5mm - 8mm Single
1.6mm 2mm 25mm 2.0mm 6mm - 10mm Single
1.8mm 2.5mm 36mm 2.2mm 8mm - 13mm Single
2mm 5mm 48mm 2.5mm 15mm - 25mm Single
2mm 3mm 56mm 2.5mm 9mm - 14mm Single
2.5mm 4mm 48mm 3.0mm 9mm - 14mm Single
2.5mm 5.5mm 72mm 3.0mm 16mm - 27mm Single
3mm 4.5mm 72mm 3.25mm 10mm - 20mm Single
4mm 6.5mm 76mm 4.5mm 16mm - 25mm Single
4.5mm 7mm 90mm 5.0mm 20mm - 30mm Single
5mm 7mm 102mm 5.5mm 20mm - 35mm Single
6mm 8mm 124mm 7.0mm 28mm - 40mm Single
7mm 10mm 124mm 8.0mm 28mm - 45mm Single
8mm 11mm 128mm 9.0mm 30mm - 45mm Single
2mm 4mm 56mm 2.5mm 8mm - 14mm Double
3mm 5mm 72mm 3.5mm 14mm - 20mm Double
4mm 6mm 92mm 4.5mm 17mm - 24mm Double
5mm 6mm 108mm 5.5mm 18mm - 30mm Double
6mm 8mm 138mm 6.5mm 24mm - 36mm Double
7mm 9mm 148mm 8.0mm 26mm - 40mm Double
8mm 8mm 149mm 9.0mm 24mm - 40mm Double

Single / Double Coil R-Clips

Retaining pins or R-clips are stocked in two designs – the single coil for most applications and the double coil for more demanding use.

They are manufactured in either stainless steel A2 of marine grade stainless steel A4, zinc plated or spring steel and the size ranges from 1.2mm to 8mm wire diameters.


  • Zinc plated spring steel
  • Stainless steel 


Technifast R Clip


Single R Clip