American Terminal E-Ffy250n-100 Economy Nylon Fully-Insulated Female Quick Disconnects (12/10-Gauge) (12 Volt-Car Stereo Access / Mobile Audio Hook-Up Accessories)
I like these because they are fully insulated and the nylon is very stiff and strong!  No bare wire show after crimp is made.<br />And the package comes in a clear envelope, 100 per package.