Chinese-standard Color Nylon Head Hex Self-Drilling Screw

1. Applicable fields and product standards

This product is produced in accordance with Chinese national standard drill point screw specifications. It is a special fastening accessory for outdoor roofing. The colorful nylon cap has both waterproof and decorative effects. It is widely used in color steel workshops, photovoltaic roofs, steel structure awnings, sunrooms, and outdoor enclosure projects. It is exported to overseas building materials markets in batches all year round. It comes with a drill point that eliminates the need for pre-drilling holes. The extension rod is suitable for superimposing multiple layers of rock wool sandwich panels. It is the main fastener for exposed roofs.

2. Raw materials and production processes

Selected raw materials from large steel mills, the hardness of the drill point cutting edge reaches the standard, and the thick steel sheet drilling is resistant to chipping at the tip and break at the drill point. Production process: rough drawing of raw materials, annealing, phosphating, fine drawing, cold heading, point forming, thread rolling, heat treatment processing, zinc plated, injection molding, washer assembly, packaging, twelve processes, segmented thread design, self-drilling in the front section, smooth locking in the rear section, the long rod is evenly stressed and not easy to bend; the nylon cap is injection molded at high temperature, and the buckle is firm and not easy to fall off.

3. Product core advantages

Double-layer waterproof structure: The built-in PVC waterproof pad prevents water seepage, and the outer nylon cap isolates the sun and rain. Double protection prevents roof leakage, and is resistant to long-term UV exposure without cracking.

Multi-color decoration selection: blue, gray, green, red and other color nylon heads can be matched with different color steel tiles. The overall roof will be beautiful and tidy after completion.

Chinese national standard self-drilling performance: easily drills through cold-rolled steel sheets and zinc plated iron sheets, and is suitable for all types of conventional roofing sheets.

4. Quality control warehousing and supporting services

All series of Chinese national standard specifications are in stock, with 48-hour rapid dispatch. Engineering projects and full-container export orders can be accepted. The drill point hardness, coating quality, and nylon cap buckle strength are randomly inspected before leaving the factory, and defective products are eliminated. It can be supplied in complete sets with conventional hexagonal drill points; it supports customized special lengthening, customized color matching and nonstandard drill points, and stable production capacity ensures long-term supply for large-scale infrastructure projects.