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Types of screw head shapes
Learn about the types and characteristics of typical screw head shapes. Please refer to it when choosing products.
| Pan (head) |  |
●A typical screw with rounded corners on the top surface that looks like an upside-down pan ●Generally used screw |
|---|---|---|
| Countersunk (head) |  |
●With a countersunk screw head ●Use when you don’t want it to protrude, or when you want it to be the same height as the element to be fastened ●It must be element that fastens with pilot hole processing that matches the countersunk (counterbore processing) ●When expressing the length under the neck, the plate indicates the length from the head |
| Raised countersunk (head) |  |
●The shape of the top surface of the plate is rounded ●If you use a plate, it may get caught in the recessed part, but if you use a round plate, it will not get caught ●When expressing the length under neck, raised countersunk refers to the length from the brim. |
| Truss (head) |  |
●Smooth round shape ●Compared to a pan head, the height of the head is lower and the diameter of the head is larger. ●Due to the large outer shape, the ground contact area is large, which leads to loosening prevention. |
| Binding (head) |  |
●Smooth round shape ●Compared to a pan head, the height of the head is lower and the diameter of the head is larger. ●Due to the large outer shape, the ground contact area is large, which leads to loosening prevention. |
| Small countersunk (head) |  |
● The top part of the countersunk screw is shaved ● The diameter of the head is small, so it can be used in narrow places and fine equipment where normal countersunk screw cannot be used. |
| Shinwasher |  |
●Because the height of the head is low, the protrusion is not noticeable. ●Wide seating surface for secure fastening. ●The appearance after installation is also important. |
| Round(head) |  |
● The head is similar to a sphere cut in half, and the shape is closer to a sphere than a pan ●Not very popular now |
| Hexagon (head) |  |
●It has a hexagonal head and is often used as a set with a nut. ●It is tightened with a spanner or wrench. ●Used for construction and large equipment. ●Functionality is more important than appearance. |
| With Flange |  |
●Bolt with a conical flange ●The bearing surface area is large to prevent loosening and to prevent from sinking ●No need to install a washer, improving work efficiency |
| Hexagon socket (head) |  |
●The head of the cylinder has a hexagonal hole. ●Uses a hexagonal wrench for tightening. ●Also called a cap bolt. ●Can work in narrow spaces and smaller machines. |
| Button (head) |  |
●Rounded head shape with hexagonal hole ●Use a hexagonal wrench for tightening ●Can be used in narrow spaces where a screwdriver cannot be used ●Lower head than with a hexagonal hole |
| Low head |  |
●It is a screw with a low head height. ●Ideal for device and equipment where the space is limited ●Appearance is good because there are few protrusions ●General hex bolt head is 6mm, low head bolt is 4mm |
| Extra Low head |  |
●Screw head height is even lower ●There is almost no protrusion ●Extra low head bolts are 0.7 to 1.2mm compared to 6mm for general hex bolts |
