Wanted: Correct Screw for heater hose retainer

[Bad Brad]

I need the correct heater hose retainer screw that attaches to the alternator bracket. I do not know what the head markings are on the top of the screw?
The GM part # is 9420152 it is also in the AIM page 277 # 15

[Rixls6]

This is the correct screw you need Brad, "E" on the head, but I don't have one.

http://i36.photobucket.com/albums/e43/Rixls6/2008Chevellabration112.jpg