U Joint bolt size

[Jahns44]

I'm just wondering if anyone knows what size the front drive shaft u joint bolts are. I'm not at home yet and just wanted to make sure I get right size before going all the way back. Thank you. It's a 1999 ford explorer

 

[swshawaii]

12mm 12 point.

U-joint removal and replace-how to with pics
http://www.explorerforum.com/forums/showthread.php?t=191429