While the quantity of self-drilling screws used in prefabricated steel structure projects isn’t large, the quality requirements are still very high. Why are high-quality self-drilling screws necessary? High-quality self-drilling screws are absolutely essential.
The function of self-drilling screws in prefabricated steel structure projects is to secure and lock the prefabricated steel panels to prevent them from falling off. If poor-quality self-drilling screws are used, problems such as:
1. The screw shank being too thin leads to the cap falling off and the screw breaking after drilling through.
2. Substandard dovetail chuck technology resulting in burrs, and a dull drill bit causing incomplete drilling and the drill bit turning red-hot (of course, some issues are due to the steel material; avoid using angle iron or steel from small steel mills).
3. Poor cold heading process of the hexagonal cap leads to slippage of the hexagonal head, etc.
Such accidents caused by substandard manufacturing processes and quality are often accompanied by unimaginable consequences.
However, on this beautiful land of China, I witnessed a steel structure collapse under the weight of heavy snow due to shoddy workmanship and substandard quality control, resulting in casualties and irreparable property damage. Was this a natural disaster or a man-made one? I’m sure you, the readers, know the answer better than we, the self-drilling screw manufacturer—Hebei Wotu Fastener Manufacturing Co., Ltd. Self-drilling screws may be small, but they are crucial to the safety of the entire project. Friends, don’t let a small screw lower the safety of the entire project. To lose sight of the bigger picture is a terrible mistake! Great craftsmanship begins with the humble self-drilling screw!
DIN 931-style half-thread and DIN 933-style full-thread hex bolts should not be selected from diameter and overall length alone. The practical choice depends on the joint stack, required grip, location of the thread transition, available nut engagement, mating hardware, material or property requirement, coating system and governing product specification. A half-thread bolt is not automatically […]
A bolt manufacturer should be evaluated against a defined joint, drawing and acceptance plan—not a product list or unit price alone. Buyers need to verify whether the supplier can manufacture the required geometry, control material and heat-treatment requirements where applicable, manage threads and coatings as one dimensional system, inspect critical characteristics, preserve batch traceability and […]
