It is used to attach the three levers to the base and acts as a pivoting pin for the levers. 

 

 

 

 

 

Length: 0.0000 in
Width: 0.0000 in
Height: 0.0000 in
Weight: 0.300 oz
Packaging: 0.0000 kg
Units in box: 1
Parts by Make/Model > Kahler Parts > Stringlocks
Parts by Type > Locknuts and Stringlocks > Locknut and Stringlock Hardware