Screws are used to connect two pieces of connectors, generally the head of the screw will be protruded in the upper surface of the connected object, so that the surface is not smooth. But if some are not so, there are many kinds of screws, so what is the difference between flat head screws and countersunk head screws? What are the dimensions of flat head screws? Don’t worry, the following nine is hardware network to explain for you, let’s see.

What is the difference between flat head screw and countersunk head screw?
Flat head screws are screws used for construction sites and other projects. The screw body is characterized in that the axial surface of the screw body is formed with an axial extension of the screw, and the tail end is provided with at least one cutting groove.

Countersunk screw, also known as countersunk screw, also known as flat screw, is a construction part. The head is a 90 degree cone, similar to the common wood screw, the head has a tool tightening slot, a font, a cross, an inner hexagon, a club shape, a pentagon and so on.

1. Different concepts

Flat head screw: The axial surface of the screw body is formed with an axial extension of the screw, and at least one groove is cut at the tail end. A row of chip grooves is dug at the cutting groove to the center of the screw, and the chip grooves should go deep into the screw body and exceed a predetermined Angle of the center line, the main function is to avoid the chip blocking the cutting groove.

Countersunk head screw: The head of the screw into a 90 degree cone, the head has a tool tightening slot, a slot, a cross slot, a hex slot, a plum slot, etc.

2. Different contact surfaces

The contact surface of the flat head screw and the workpiece is a bit plane, while the countersunk head screw is a bit cone.

3, the force size is different

The force on the flat head screw is larger, while the force on the countersunk head screw is smaller.

4. Different combinations

Flat head screws can be used in combination with the flat gasket, while countersunk head screws can only be used in combination with the gasket with taper.

5. Different ways of use

Flat head screws can go deep inside the countersunk hole, or they can be exposed to the outside, but countersunk screws are generally only inside the countersunk hole.