I guess as long as we're discussing our favorite fasteners, I'll throw my $0.02 in. I haven't read down my messages yet to see how this thread got started, so excuse me if I'm out of turn. In addition to being an EE, I'm also a (mostly) self taught machinist. I have a preference for "Allen" or socket cap screws. I'll lump in Torx and Robertson as derivatives. Over the years I've come to hate slotted head (ever try to use a power driver with one?). I've also noticed that a Phillips bit bears an amazing resemblance to a countersink bit and tends to function like one -- especially on a Phillips head screw -- especially if its one that will be prominently visible on the front panel of your newly completed project! Frank Richterkessing FRANK.RICHTERKESSING@APPL.GE.COM