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Fasteners for a lasting, firm hold

Screw driving basics

Screw driving basics

Countersink cutters: Many exterior screws have countersink cutters on the underside of the head that aid in sinking them. The number and prominence of the ridges tell how effective they are in that task. One screw, Titan's Splitstop (shown right), has aggressive cutters to both countersink the head and minimize splitting.


Continued on page 5:  Thread pitch and count

 

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