Non-standard stainless steel screws are different from standard parts on the market, so how do we choose the model according to the head of the screw when customizing non-standard stainless steel screws?
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1. Countersunk head
This type of head should be used more, because after being screwed into the product, it will not protrude the surface of the product and affect the appearance of the product, and it is mostly used for the appearance of the product.
2. Semi-sunk head
Some heads have square necks or tenons under them to prevent screws and nuts from turning. The head features slots and cross recesses, both of which have a smaller diameter. Generally, the diameter d is smaller than M10.
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3. Pan head
The head of the pan head screw can have grooves, cross grooves, plum blossom grooves, etc., mainly for the convenience of tightening with tools. It is mostly used for products with small strength and torque, and is generally used for small host products such as household appliances.
4. Hex head
Hex head is also a common head type in screw fasteners. Some hex head fasteners also have tables, holes, bosses and flanges. Hex head screws have high mechanical properties and are easy to tighten with a wrench. It can also be applied to large tightening torque and has a wide range of applications. Hex head screws with bosses or flanges on the bearing surface can also be used as washers. The pressure-bearing surface is increased, and the anti-loosening effect is good. It can also be used to connect steel structures with important main structures.
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5. Round head
Slotted round head screws are generally used in places where the space is small and the force is not large, while flat head round head screws are mostly used for connection and fixation of thin-walled plate structures.
6. Big flat head
Square necks and tenons are used to set screws, while tightening devices are used to fasten the connection of metal parts.
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7. Lag screw
The lag screw has a large head area, which is convenient for wrench tightening and rotation. Larger tightening torque can be applied, but not easy to tighten. They are mostly used for thicker and often disassembled structures, not for parts that often need to be disassembled.
8. Inner hexagonal head, flower head
It has the same function as the countersunk head in the field of use, but its strength and tightening torque are greater than that of the countersunk head.
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The above are the common head shape characteristics of non-standard stainless steel screw fasteners. When customizing non-standard stainless steel screws, the corresponding non-standard head type can be customized according to the actual use of the product.

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