Modular Adapters for Above Knee Prosthesis
This range covers the modular adapters used to connect a prosthetic knee joint to an above knee socket: three prong socket adapters in male and female versions, the assembly bracket, and the translator.
- Three prong socket adapter female, CNC milled (prongs cannot be bent, with holes for pyramidal receiver) or die-cast (prongs can be bent)
- Female socket adapter with rotating pyramid, stainless steel or titanium
- Three prong socket adapter upper part, CNC milled or die-cast; lower part male or female
- Three prong socket adapter male, CNC milled or die-cast
- Assembly bracket for above knee socket, fixed with screws or laminated within the socket
- Translator fitted on the three prong socket adapter: shifts alignment up to 20 mm in any 360 degree direction
- Accessories: 4 M6 screws for the lower part and 4 M5 screws for the upper part
- Component weight from 109 g to 350 g depending on version
- Maximum user weight 130 kg (100 kg on selected versions)
- All adapters tested according to ISO 10328
- Warranty 36 months
Three Prongs Socket Adapter Female

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Code 5.004.04.CNC |
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| Characteristics |
CNC milled, prongs can’t be bent due to the strength with holes for pyramidal receiver |
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| Component Weight | 246 g | |
| Material | Stainless Steel | |
| Maximum User Weight | 130 Kg | |

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Code 5.004.04.DC |
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| Characteristics |
Die-cast, prongs can be bent with holes for pyramidal receiver |
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| Component Weight | 175 g | |
| Material | Stainless Steel | |
| Maximum User Weight | 130 Kg | |
Female socket adapter with rotating pyramid

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Code 5.004.21.SS |
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| Component Weight | 144 g | |
| Material | Stainless steel/Stainless steel | |
| Maximum User Weight | 130 Kg | |
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Code 5.004.21.T |
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| Component Weight | 114 g | |
| Material |
Stainless steel/Titanium |
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| Maximum User Weight | 130 Kg | |
Three Prongs Socket Adapter – Upper Part

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Code 5.004.06.A.CNC |
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| Characteristics |
CNC milled, it can’t be bent due to its strength |
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| Material | Stainless Steel | |
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Component Weight |
190 g | |
| Maximum User Weight | 130 Kg | |
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Code 5.004.06.A.DC |
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| Characteristics |
die-cast, it can’t be bent |
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| Material | Stainless Steel | |
| Component Weight | 190 g | |
| Maximum User Weight | 130 Kg | |

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5.004.06.B |
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Three Prongs Socket Adapter – Lower Part Male |
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Code 5.004.06.C |
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Three Prongs Socket Adapter – Lower Part Female |
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Three Prongs Socket Adapter Male

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Code 5.004.05.CNC |
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| Characteristics |
CNC milled, prongs can’t be bent due to the strength |
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| Material | Stainless Steel | |
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Component Weight |
240 g | |
| Maximum User Weight | 130 Kg | |

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Code 5.004.05.DC |
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| Characteristics |
Die-cast, prongs can be bent |
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| Material | Stainless Steel | |
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Component Weight |
240 g | |
| Maximum User Weight | 130 Kg | |
Male socket adapter with rotating pyramid

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Code 5.004.20.SS |
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| Material | Stainless steel/Stainless steel | |
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Component Weight |
134 g | |
| Maximum User Weight | 130 Kg | |
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Code 5.004.20.T |
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| Material | Stainless steel/Titanium | |
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Component Weight |
109 g | |
| Maximum User Weight | 130 Kg | |
Assembly Bracket For Above Knee Socket

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Code 5.004.07 |
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| Accessories | 4 screws M6 for the lower part and 4 screws M5 upper part | |
| Material | Stainless Steel – upper part Aluminum alloy 7075 – the lower part | |
| Component Weight | 350 g | |
| Maximum User Weight | 130 Kg | |
Translation Adapter

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Code 5.004.14 |
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| Characteristics | 36 mm | |
| Material | Stainless steel | |
| Component Weight | 350 g | |
| Maximum User Weight | 100 Kg | |
Key specifications
| Device Category | Modular adapters for above knee prosthesis |
| Amputation Level | Above knee (transfemoral) |
| Material | Stainless steel; titanium; aluminum alloy 7075 |
| Component Weight | 109-350 g depending on version |
| Maximum User Weight | 130 kg; 100 kg on selected versions |
| Tested to Standard | ISO 10328 |
| Warranty | 36 months |
| Product Code Series | 5.004.04, 5.004.05, 5.004.06, 5.004.21 |
| Components Included in Range | Three prong socket adapter male and female; upper and lower parts; female adapter with rotating pyramid; assembly bracket; translator |
Ordering and technical support
Designed and manufactured in Italy by Roadrunnerfoot Engineering S.r.l. The full range is listed in the Roadrunnerfoot 2025 catalogue. Orthopedic technicians, clinics and international distributors can request technical data sheets, product codes, pricing and fitting support from our team.

















