Hex Head Self-Drilling Screw With Cup Washer
Latest Products
Hex Head Self-Drilling Screw With Cup Washer
Brand: Hengzuan
Surface: color zinc plated
Specifications: in stock ST5.5/ST6.3 regular diameter, rod length 19mm~75mm in stock, supports nonstandard customized, suitable for drilling steel sheet thickness 2~5mm
Packaging: carton packaging, full pallets wooden pallet packaging, support neutral packaging, private-label customization
1. Applicable fields
This product is a special fastener for the assembly of single-layer colored steel tiles, iron sheets, simple awnings, and iron sheets for doors and windows in conventional factory buildings. It is widely used in civil steel structures and small storage roofing projects. It is exported to the building materials markets in Southeast Asia, the Middle East, and Africa all year round. It comes with a drill point and eliminates the need for pre-drilling holes, making construction convenient. It is a universal main screw for assembling thin color steel sheets.
2. Production process
The raw material is high-quality carbon steel, and the hardness of the drill point cutting edge reaches the standard. It is resistant to chipping at the tip when drilling thin steel sheets. Rough drawing of raw materials – annealing, phosphating, fine drawing, cold heading forming, point forming, thread rolling, heat treatment processing, zinc plating, washer assembly, packaging, eleven processes, the whole thread is uniform, the locking force is stable; the black rubber pad has strong toughness and is resistant to sun aging. The color zinc plated coating has strong adhesion and is durable in indoor and semi-open-air environments.
3. Product advantages
Long-lasting black rubber waterproofing: Widen and thicken the black rubber gasket. After tightening, it closely fits the panel surface, seals the screw holes, and prevents rainwater leakage.
Stable locking with all teeth: The whole body is designed with all teeth, the locking force is sufficient, and the single-layer color steel and zinc plated thin panels are resistant to loosening and vibrate.
4. Quality control and services
The full range of specifications are always in stock, with fast delivery within 48 hours. Small-batch samples and full-container export orders can be accepted. The drill point hardness, thread accuracy and coating quality are randomly inspected before leaving the factory. It can be matched with various types of roof fasteners for complete shipment, and one-stop accessories are provided; it supports customized nonstandard specifications for incoming samples, and stable production capacity ensures long-term supply.
