Wanna hide your email address or your contact info?
Even though you set your Privacy Setting = Friend Only ...... YOUR CONTACT INFO is still visible.
Some have their emails showing. Lucky, most are dummy or fake email address. This is a good precaution if all else fail on Facebook.
But if you need to hide your email / contact info, here's the trick:
Go to "Privacy Settings", select "Friends Only" and click "Apply These Settings" <--- This is used to Default all settings to "Friends Only".
Then click on "Customize settings" (can't find it, try Ctrl+F and enter "Customize settings"), then go to "Contact information" section (lowest section) of page and change settings instead of "Friends Only" into "Customize" next "Make this visible to" ... either "Me Only" or "Specific People", finally "Save Setting".
It's always a good idea to preview your profile ---> "Preview My Profile" (can't find it, try Ctrl+F and enter "Preview My Profile").
Save, check and double-check.