Stainless steel large flat head self-tapping screw
Unlike ordinary mechanical threads, the screws of the self-tapping screws do not need to cooperate with the nut in use, and can be directly screwed into the substrate to connect and lock. The letter used to describe the self-tapping screw is "ST". If the thread size is 4.2mm, the length is 13mm, which is described as ST4.2 * 13mm. Stainless steel self-tapping screws are divided into two kinds of traps and counters, and they are also the most commonly used standards, but this chapter mainly introduces it. Big flattening self-tapping screwStainless steel large flat head self-tapping screw Images
Stainless steel large flat head self-tapping screws include SUS304 and SUS316, its threaded standards and production tests are the same as commonly used self-tapping screws, the installation environment and methods are the same. Why is it called stainless steel big flat self-adapter screw? First, stainless steel refers to the material 304 or 316. The large-delastic head refers to the head diameter of the self-tapping screws. It is different from the common self-tapping screws. Its head diameter is much larger, but also stainless steel large-scale head self-tapping There is only one round-headed standard, and there is no deep-headed head self-tapping screw. Let's see what it is like a picture of its physical measurement.
As can be seen from the proportion of the technical drawings, the large flat head self-adapter screw is much larger than the head diameter of the conventional product, the leftmost specification is ST2.2 * 4.5, the head diameter is 5 mm, and this 5 The size of the millimeter is reached in ST3.2 in a regular self-tapping screw. The specification of the middle stainless steel large flat head self-tapping screw is ST2.9 * 6.5, the head diameter is also more than 7 mm. The rightmost specification is SU3.5 * 19 its head diameter is 8 mm, the most important size of stainless steel large flat head self-tapping screw is the head diameter, and the thickness of the head is corresponding standard, in general Nor does it affect the installation and use.
The stainless steel large flat head self-tapping screw is very beautiful, it is buckled on top of a hat, which can play a certain decorative effect. In the assembly of furniture, this large flat self-tapping screw will often be seen. In the above chart, the leftmost specification is ST3.9 * 16, and the head diameter has exceeded 9 mm. The intermediate specifications ST4.2 * 25, the head diameter is more than 9.5 mm, and finally this is the ST4.8 * 25 stainless steel large flat head self-tapping screw measurement, its head diameter is close to 12 mm.
As can be seen from the proportion of the technical drawings, the large flat head self-adapter screw is much larger than the head diameter of the conventional product, the leftmost specification is ST2.2 * 4.5, the head diameter is 5 mm, and this 5 The size of the millimeter is reached in ST3.2 in a regular self-tapping screw. The specification of the middle stainless steel large flat head self-tapping screw is ST2.9 * 6.5, the head diameter is also more than 7 mm. The rightmost specification is SU3.5 * 19 its head diameter is 8 mm, the most important size of stainless steel large flat head self-tapping screw is the head diameter, and the thickness of the head is corresponding standard, in general Nor does it affect the installation and use.
The stainless steel large flat head self-tapping screw is very beautiful, it is buckled on top of a hat, which can play a certain decorative effect. In the assembly of furniture, this large flat self-tapping screw will often be seen. In the above chart, the leftmost specification is ST3.9 * 16, and the head diameter has exceeded 9 mm. The intermediate specifications ST4.2 * 25, the head diameter is more than 9.5 mm, and finally this is the ST4.8 * 25 stainless steel large flat head self-tapping screw measurement, its head diameter is close to 12 mm.
