Tangshan Jiayuan Metalwork Co.,Ltd.

Interior decoration projects often require large numbers of fastening connections for light-gauge steel framing, metal ceilings, ventilation ducts, and decorative metal panels. Traditional installation generally involves drilling a pilot hole before inserting a standard screw. This requires additional steps and can create alignment problems if the holes are not positioned accurately.A self-drilling screw has a drill-bit-shaped point that can drill, form threads, and fasten components within its specified material-thickness range. When selected and installed correctly, self-drilling screws can improve installation efficiency and reduce the need for additional tools. Read More

Wood screws are widely used in furniture, timber houses, decks, fences, outdoor landscaping, and structural timber connections. Because wood can absorb and retain moisture, screws exposed to damp, oxygen-rich conditions may undergo electrochemical corrosion.Common signs include discoloration, rust spots, and coating deterioration. In severe cases, corrosion can reduce the screw’s cross-sectional area and weaken the connection.The corrosion resistance of a wood screw depends on more than its surface color. The base material, plating or coating system, timber treatment, installation environment, and workmanship all influence performance. Corrosion-resistant wood screws should therefore be selected according to actual exposure conditions. A “zinc-plated” or “stainless steel” description does not automatically make a screw suitable for every application. Read More

When purchasing screws, you may encounter markings such as “M6×30,” “ST4.2×25,” “8.8,” “A2-70,” or “1/4-20 UNC.” These letters and numbers usually describe the thread type, nominal diameter, length, material, or mechanical properties of the fastener.However, there is no single screw-designation format that applies to every product. Metric machine screws, inch-thread fasteners, self-tapping screws, and self-drilling screws use different marking systems. Product codes may also vary between standards and manufacturers.For accurate selection, buyers should not rely on one size number alone. The complete product standard, technical drawing, base material, and operating environment must also be considered. Read More