Quote:
Originally Posted by Sleddgracer
the screws have to be long enough that the 'wings' have enough room to spring open once they are through the floor - if they are flipping open there is no way they can't tighten up - just takes a lot of turns to take up the slack - if the wings don't flip open, they won't work
|
He's not talking about moly bolts. He's referring to the drill flutes on the screw tip.
Why is it important for the screw thread to grip the wood? If you have a sturdy base for the screw and the head is big enough that's all that's needed.