Alpha® Lock


The contoured design allows for easy pin alignment within the locking mechanism. The Alpha Lock has a built-in one-way expulsion air valve which minimizes pistoning. Available with or without a titanium pyramid. The Alpha Lock is part of the Alpha Interlock™ Suspension System. This system allows you to interchange suspension methods without remaking a socket. The Alpha Lock may be used in laminated or thermoplastic sockets.

Product Highlights:
  • Simple and easy fabrication process
  • Optional titanium pyramid
Weight 221 g
277 g with optional titanium pyramid
70 g distal adapter only, including fabrication post
Patient Weight Limit 250 lb (115kg)
Warranty One year from date of patient fitting
U.S. L-Code Suggestions L5671
Product No. Description
700-AIS480 Alpha Interlock Suspension System w/Alpha Lock
700-AIS481 Alpha Interlock Suspension System w/Alpha Lock with Titanium Pyramid

WillowWood strongly recommends applying Loc-Tite Removable Threadlocker 242 (or equivalent) to the pin threads prior to installing the pin. Failure to ensure that the locking pin is secure in the Locking Liner could result in the pin coming out of the liner, resulting in the potential for injury to the amputee.

Alpha Lock Fabrication Instructions 

Fasteners & Torque
  M6 x 10 mm Socket Head Capscrew   hand-tighten
  M6 x 30 mm Flat Head Capscrew   9 ft-lbs/12 Nm
Related products:
700-AIS102 Alpha Interlock Suspension System Distal Adapter ONLY (70 g) (includes fabrication post)
700-AIS482 Alpha Interlock Suspension System Lock Pin 38 mm (1.5″)
700-AIS483 Alpha Interlock Suspension System Hardware Kit
Alpha Interlock Suspension System One-Way Valve
700-AIS488 Alpha Interlock Suspension System Lock Pin 51 mm (2″)
700-AIS492 Alpha Interlock Suspension System Lock Body ONLY (136 g)
AIS-KIT Alpha Interlock Suspension System Kit

Alpha® Interlock™ Suspension System
Multiple suspension options are provided from one system. Learn the fabrication techniques for using the lanyard, lock, or suction insert in laminated or thermoplastic sockets.

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