What is the difference between lever head, drywall nail, and self tapping screw? Characteristics and application of cross groove pan head self tapping screws

Whether in decoration or when purchasing furniture after decoration, screws are rarely present. They can effectively fix furniture and make it more secure. Observant friends will find that there are many types of screws, among which the most common are drywall screws and self tapping screws. So, the difference between drywall screws and self tapping screws? What are the characteristics and application of cross groove pan head self tapping screws? Let's learn about it together.

2. The difference in character recognition lies in its cutting tail Each cutting tail has a shape that can collect waste materials from cutting If the self tapping screw is screwed into a blind hole (non penetrating hole), its fragments will remain and be sealed at the bottom of the hole But if the through hole is breached, the waste will fall on the other side of the workpiece So when choosing this type of self tapping screw, it is necessary to consider this, as waste may cause pollution, fall into running parts, or make the electronic substrate unable to operate

3. Screw threads rolled into self tapping screws are all mechanical threads, similar to the coarse thread of the unified thread in the UK and the US. Please refer to SAEJ81 regulations For metric threads, please refer to SAEJ1237 and DIN7500 regulations

4. There are two types of self tapping screws for drilling tail: wide thread BSD and mechanical thread CSD There are also special thread types, including high and low double threads, and various drilling tails are also suitable Due to the nature of the drilling tail and thread, drilling tail screws are not suitable for blind hole operations When assembling self drilling screws, the drill tail needs to fully penetrate the workpiece before cutting or forming the thread, so there are usually some debris. If thread cutting type threads are used again, debris is even more inevitable Therefore, in practice, this issue must be considered For BSD and CSD drill tail screws, please refer to the regulations of SAEJ78 and DIN7504 (wide thread). Dry wall nail

5. Standard self tapping screw identification characters, including symbols representing thread and tail shape Self tapping screws have one or two characters representing threads to represent mechanical threads or wide threads (SPACED) If there is a recognition character "B", it represents a wide threaded screw The absence of "B" represents mechanical threads The tail end represents characters used to distinguish self tapping screws as thread forming, cutting, rolling, or self drilling Dry wall nail

6. Mechanical threads have a thread angle of 60 degrees and the same pitch for coarse and fine threads as the unified thread in the UK and the US. If the screw is lost or needed after disassembly, standard thread fasteners can be used instead

7. Wide threads have a thread angle of 60 degrees but a wider pitch, and due to their wide pitch, their threads are steeper, resulting in a larger thread lead than mechanical threads There is another type of thread specifically designed for plastic, with a thread angle of 48 degrees, commonly known as PT thread screw

1. Cross groove pan head self tapping screws are used for non-metallic or softer metals, without the need for low holes or tapping; Self tapping screws are pointed, so that they can "self tap"; Ordinary screws are flat headed and of uniform thickness Self tapping screws refer to holes drilled without the need for tapping teeth. The screws used are different from ordinary ones, with pointed heads and larger tooth spacing, similar to shaftless wire tapping. They can be directly screwed in without tapping teeth. This method is commonly used for metals and plastics. It can use its own threads on the consolidated material to "drill, squeeze, and press" the consolidated body into corresponding threads, making them tightly connected to each other.

2. Cross groove pan head is also called cross self tapping screw. The names are different, but the meaning is the same. All of them have a self attacking effect. The main function of self tapping screws is that they do not require nuts, which saves a lot of cost. No cost for nuts is required. There are many commonly used self tapping screws, such as cross groove pan head self tapping screws, countersunk self tapping screws, padded self tapping screws, umbrella head self tapping screws, cut tail self tapping screws, and triangular tooth self-locking screws, which are widely used in the market.

Screws are quite common in our daily lives. Is that the difference between drywall screws and self tapping screws? What are the characteristics and application of cross groove pan head self tapping screws? The introduction, I hope it can be helpful to you! Screws are widely used in our lives and have brought many conveniences. It can be said that screws are closely related to our lives.

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