Cross Recessed Countersunk Head Self Tapping Screws

A countersunk head self-tapping screw is another common type of screw that is used in various applications. It is similar to a pan head self-tapping screw in terms of being self-tapping and designed to create its own internal threads. However, it has a different head shape and profile. Here are some identifying characteristics of a countersunk head self-tapping screw:

Head Shape: The screw has a flat head with a conical recess on the top. This conical recess allows the screw to sit flush with the surface of the material when it is fully installed. The angle of the countersink can vary, commonly 82 degrees or 90 degrees.

Thread Type: Like other self-tapping screws, countersunk head self-tapping screws have specially designed threads that are sharp and spaced at a specific pitch. These threads enable the screw to cut through the material and create internal threads.

Point: The screw has a sharp, pointed tip that assists in initiating the tapping action and helps guide the screw into the material.

Diameter and Length: The diameter and length of countersunk head self-tapping screws can vary depending on the specific application and material. The diameter is typically specified in terms of gauge or millimeters, and the length is measured in millimeters or inches.

Material and Finish: Countersunk head self-tapping screws can be made from various materials, including stainless steel, carbon steel, or plated steel. The choice of material depends on factors like the environment, load-bearing requirements, and corrosion resistance. They may also have different finishes like zinc plating, black oxide coating, or other protective coatings.

Drive Type: Countersunk head self-tapping screws often have a standard drive type, such as Phillips, slotted, or Torx. The drive type determines the specific screwdriver or bit required for installation.