Modular Prosthetic Adapter for AK (Above Knee)

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

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

Code 5.004.04.CNC

Characteristics

CNC milled, prongs can’t be bent due to the strength with holes for pyramidal receiver

Component Weight 246 g
Material Stainless Steel
Maximum User Weight 130 Kg

Code 5.004.04.DC

Characteristics

Die-cast, prongs can be bent with holes for pyramidal receiver

Component Weight 175 g
Material Stainless Steel
Maximum User Weight 130 Kg

Female socket adapter with rotating pyramid

Code 5.004.21.SS

Component Weight 144 g
Material Stainless steel/Stainless steel
Maximum User Weight 130 Kg

Code 5.004.21.T

Component Weight 114 g
Material

Stainless steel/Titanium

Maximum User Weight 130 Kg

Three Prongs Socket Adapter – Upper Part

Code 5.004.06.A.CNC

Characteristics

CNC milled, it can’t be bent due to its strength

Material Stainless Steel

Component Weight

190 g
Maximum User Weight 130 Kg

Code 5.004.06.A.DC

Characteristics

die-cast, it can’t be bent

Material Stainless Steel
Component Weight 190 g
Maximum User Weight 130 Kg

5.004.06.B

Three Prongs Socket Adapter – Lower Part Male

Code 5.004.06.C

Three Prongs Socket Adapter – Lower Part Female

Three Prongs Socket Adapter Male

Code 5.004.05.CNC

Characteristics

CNC milled, prongs can’t be bent due to the strength

Material Stainless Steel

Component Weight

240 g
Maximum User Weight 130 Kg

Code 5.004.05.DC

Characteristics

Die-cast, prongs can be bent

Material Stainless Steel

Component Weight

240 g
Maximum User Weight 130 Kg

Male socket adapter with rotating pyramid

Code 5.004.20.SS

Material Stainless steel/Stainless steel

Component Weight

134 g
Maximum User Weight 130 Kg

Code 5.004.20.T

Material Stainless steel/Titanium

Component Weight

109 g
Maximum User Weight 130 Kg

Assembly Bracket For Above Knee Socket

Code 5.004.07

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

Code 5.004.14

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.

Additional information

Device Category

Modular adapters for above knee prosthesis

Amputation Level

Above knee (transfemoral)

Components Included in Range

Three prong socket adapter male and female; upper and lower parts; female adapter with rotating pyramid; assembly bracket; translator

Material

Stainless steel; titanium; aluminum alloy 7075

Fabrication Method

CNC milled or die-cast versions

Translator Alignment Shift

Up to 20 mm in 360 degree direction

Component Weight

109-350 g depending on version

Maximum User Weight

130 kg; 100 kg on selected versions

Accessories

4 screws M6 lower part; 4 screws M5 upper part

Tested to Standard

ISO 10328

Warranty

36 months

Product Code Series

5.004.04, 5.004.05, 5.004.06, 5.004.21

Brand

Roadrunnerfoot

Manufacturer

Roadrunnerfoot Engineering S.r.l.

Made In

Italy