The shape of the screw head is described as "flat","oval","round","truss","bugle",or "hammered". Looking at the drawings should make these self-explanatory.

The general size of a screw is given a number. As the number increases, so does the size of the entire screw, both head size and shaft size--but not length.(don't blame us for all this) Therefore, a #8 screw is about twice the size of a #4 screw, but may be the same length. Wake Up!; This is important.

Most wood screws have a common "pitch" to the treads, but some have a thread with a steeper incline. We simply call this a "fast" thread. Think of this as a road going up a mountain; the steeper the road, the sooner you get to the top.

Also in reference to threads you will see "8-32". This is the common knob and pull screw thread. The"8" refers to the size (diameter) of the screw, and the "32" means it has 32 threads to the inch.

And then, the are those darned "various finishes". Watch'em and select the right one to match you project.

The most interesting screw here, if there is such a thing, is our variable length break-off knob screw. If you do not know exactly what length screw will work, order these and break them off where you need them. A unique design allows this to be done without damaging the threads.

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