Woodruff key for motion control pin

[WildmanC120 613]

What is the size of the half moon woodruff key in the long pin holding the motion control setup? Mine seems to be missing.  I found this out because the lever was drifting and no matter how much I tensioned it did nothing. 

 

Also where can I get the key? 

[The Tuul Crib 7,337]

My local Ace Hardware here had the 

woodruff keys l needed. You might find them there at yours.

[JAinVA 4,623]

NAPA has them as well.

[pfrederi 17,885]

1/8" x 1/2"  Key #3

[WildmanC120 613]

Awesome. Thanks fellas. 

[WildmanC120 613]

Found them at tractor supply just for FYI.