This article will introduce the different types of screw heads and the differences between them to help you learn more about screws.
Pan Head Screws
Pan head screws are divided into a slotted head type and a cross groove. If an electric screwdriver is used, the cross groove is generally selected.
Pan head screws for plastic\wood\metal studs
Pan head screws also have a variety of studs to choose from, studs are divided into plastic, wood, or common metal.
Round Head Screw
The round head screw has only one head type with a slotted head, and the semi-circular screw head will be exposed on the installed surface after installation.
The difference between pan head screws and round head screws
1. Appearance difference: The heads of the round head screws are round, and the side view is semi-circular. The heads of pan head screws are round and the side view is trapezoidal.
2. Scope difference: The round head screw covers a larger range, as long as the screw head is round, it can be called a round head screw. But if it is a pan head, it can only be called a pan head screw. Round head screws include pan head screws.
3. The difference in groove type: round head screws have only one head type with a slotted head, while pan head screws have head types with crosshead and slotted head to choose from.
Mushroom or Truss Head Screws
The mushroom or truss head screws have a lower and larger dome. The head of the mushroom head screw is larger than the head of the dome head screw, the force area is also larger, and the product is not easily damaged at the screw connection.
Countersunk Head Screws
Countersunk head screws can be sunk under the surface to make the surface flat. The head is a cone, the head has a tool tightening groove, and there is a slotted, cross, inner hexagon, plum blossom, pentagon, etc.
Flat Head Screw
The axial surface of the flat head screw body is formed with axially extending threads, and there is at least one cutting groove at the rear end. A chip groove is dug into the center of the screw at the notch opening, and the chip groove should go deep into the screw body and exceed the center line by a predetermined angle. The main function is to prevent chips from blocking the notch.
What are the differences between flat head screws and countersunk head screws?
1. Differences in the contact surface. The contact surface of the flat head screw and the workpiece is a flat surface, while the countersunk head screw is a conical surface.
2. The force difference. Flat head screws are more stressed, while countersunk screws are less stressed
3. Combination differences. Flat head screws can be used in combination with flat washers, while countersunk head screws can only be used with taper washers.
4. Differences in usage. Flat head screws can be countersunk on the inside or exposed on the outside. The countersunk head can only be used inside the counterbore.
Oval or Raised Head Screws
It is also called a raised countersunk head screw.
What is the difference between half countersunk head screws and countersunk head screws?
The top of the half-countersunk head screw has an arc, which is more beautiful.
Bugle Head Screws
This type of screw is similar to a countersunk head screw, except that the angle from the shank to the head is smooth and curved.
Cheese Head Screw
The head of the cheese head screw is cylindrical and the height is about half the diameter of the head.
Fillister Head Screw
Fillister head screws are similar to cheese head screws in that the head is also cylindrical, but the top surface is slightly convex. The height-to-diameter ratio of the head is greater than that of the cheese head.
Flange Head Screws
Flange screws are composed of a hexagonal head and a flange plate (the gasket under the hex is fixed with the hex) and a screw (a cylinder with an external thread), eliminating the need for a flat washer. It needs to be matched with a nut to securely connect two parts through holes.
Hexagon Socket Head Screws
The hexagon socket head screw is a screw with a hexagonal inner hole on the head. The most commonly used hexagon socket head screw is a cylinder head screw.
The difference between hexagon socket head screws and hexagon head bolts
The head of the hexagon head bolt is hexagonal. The head of the hexagon socket head screw is generally round.
Square Head Screw
The heads of square head screws are square.
KENENG can supply screws with various head types and can also be customized to size according to your requirements. We are a manufacturer of fasteners as well as a factory. You can contact us to get the best quality products and the most reasonable price.