8-18 x 1/2 Self Dril/Self Tapping Pan Head, Zinc, Square, Qty:100

8-18 x 1/2 in. Self Drilling/Self Tapping Pan Head, Zinc, Square - Qty:100

Self drilling screws turned out to be such a good idea that everybody wanted them.

So in addition to the popular hex drive style used so often when assembling air conditioning ductwork, they are also manufactured in pan head. Zinc plated for mild corrosion resistance, stress relieved for strength. Square Recess.

The silver appearance of Clear Zinc has been around for many years and remains very popular. It also provides a moderate level of rust protection. Since this is a true electroplating, the zinc coating is part of the surface of the steel and very durable.

Deep Thread: Characterized by a reduced diameter shank resulting in a deep thread profile. A single lead thread, meaning that one revolution advances the screw one pitch. (Pitch is equal to 1 divided by the number of threads per inch. For a screw with 10 threads per in., one revolution will advance the screw 1/1O in. into the wood.)

The deep thread form provides superior resistance to pull-out. This design feature is commonly called a Lo-Root® or Production Screw.

Screws with a drill point have a particularly profiled tip. that is reminiscent of a drill with two small blades. This makes the screw ideal for fastening metal and plastics. Screws with a drill point are particularly suitable for fastening fittings to window profiles with metal reinforcements.