Flat Head Screws

What is Flat Head Screws?

Flat head screws, also known as countersunk screws, are a type of screw that features a flat head with a conical shape. The head of the screw is designed to sit flush with the surface of the material being fastened, which can help to create a smooth and even finish.

Flat head screws are commonly used in woodworking and metalworking projects, as well as in construction and engineering applications. They are often used in conjunction with countersink bits or counterbore bits to create a recessed hole that allows the screw head to sit flush with the surface of the material.

Flat head screws are available in a variety of sizes and materials, including steel, stainless steel, brass, and aluminum. They may also be coated with various finishes, such as zinc or black oxide, to provide additional protection against corrosion and wear.

Flat Head Screw Specifications

The specifications of flat head screws can vary depending on the specific application and industry requirements. However, some common specifications for flat head screws include:

1. Head diameter: Flat head screws typically have a head diameter that ranges from 1.5 times to 2 times the diameter of the screw shank.

2. Head height: The height of the flat head can vary, but it is generally around 0.6 times the diameter of the screw shank.

3. Thread type: Flat head screws can have different thread types, including coarse, fine, and machine threads.

4. Material: Flat head screws can be made from a variety of materials, including stainless steel, brass, aluminum, and various grades of steel.

5. Coating: Flat head screws may be coated with different materials, such as zinc or black oxide, to provide protection against corrosion and wear.

6. Drive type: The drive type of a flat head screw can vary, with popular options including slotted, Phillips, and Torx.

7. Length: The length of a flat head screw can range from a few millimeters to several inches, depending on the application and material being fastened.

It is important to choose the appropriate flat head screw specifications for your specific application to ensure proper performance and durability.

•  ASME B18.3, ASME B18.3.6
•  DIN 963 / ISO 2009
•  DIN 965 / ISO 7046

•  DIN 7991 / ISO 10642

Driver Availability (dependant on size/material)
•  Socket
•  Slotted
•  Phillips

Flat Head Screw Sizes
•  #00 - 4"
•  M1.2 - M100