Dragsix,

Here is a previous conversation on "woodruff" keys that I think has the basic answer to your question.

Also, this Common Item Page provides the dimensions for the various common "woodruff" keys used for your application.

If you use the info from the above thread:

Originally Posted by tclederman
If a person who needs that woodruff key does not have a woodruff key, Denny, what part-number or dimensions would you send them (send me) with when they go to their FLAPS/etc?

one possibility?:
Width-3/16(.188) In., Length-47/64(.728) In., Height-19/64(.301) In

another possibility?:
Length in Inches--3/4
Width in Inches--3/16

??

It appears the one you may be looking for is GM# 106751 (see screenshot below).

Listed as available from all kinds of vendors online. Best price I found in a short search was from the Filling Station.

Hope this helps.

Dan
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