Modular Prosthetic Adapters for BK (Below Knee)

Modular Adapters for Below Knee Prosthesis

This range covers the modular adapters used to build a below knee prosthesis: square section socket adapters, four prong socket adapters and the wood or polyurethane socket adapter.

• Square section socket adapter male connects the tubular adapter to the polyurethane or wood socket adapter
• Square section socket adapter female connects the socket to the prosthetic knee, fixed with four screws
• Rotating versions available for both male and female square section adapters
• Four prong socket adapter connects the tubular adapter to the socket and is laminated within the socket
• Wood and polyurethane socket adapter with holes, fixed with four screws
• Material options: aluminum alloy 7075, stainless steel, titanium grade 5
• Hole diameter 5 or 6 mm; M6 screws supplied
• Component weight from 50 g to 207 g depending on version
• Maximum user weight 130 kg
• All adapters tested according to ISO 10328
• Warranty 36 months

Socket Adapter Square Section

Rotating socket square adapter section male

Four Prongs Socket Adapter 

Socket Adapter Square Section Female

Rotating socket square adapter section female

Socket Wood – PU Adapter with holes

To choose other modular adapters to connect with modular adapter for BK

For the patient’ videos that use our products

Key specifications

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.