The head of CSK head self tapping/drilling screw is a 90-degree centrum, similar to the common wooden screw. The head of normal screw will protrude from the surface of the connected object, making the surface lose its flatness. But the CSK head screw can be under the surface of material to make it smooth. This is the biggest advantage.
The product is processed by heat treatment and carburization technology, its surface is galvanized with good anti-corrosion performance, including white-blue zinc plated, yellow zinc plated, color zinc.
It is used to connect the wood board and iron plate, and between steel sheets. It can be directly drilled into the hole by electric tools without tapping.
|Finish||White-blue zinc plated, yellow zinc plated, color zinc|
|Head type||DIN7504P CSK head|
|Point||Sharp point or self-drilling point|
|Packing||1000pcs/800pcs/500pcs per box, or 1kg/25kg per bag|
|MOQ||Two tons for each size|
|Delivery time||Normally in15-30 days|
Pycnometer of self tapping screw white-blue zinc plated, C1022
Pycnometer of self drilling screw white-blue zinc plated, C1022
4. Production process
|1. Raw material||2. Cold upsetting||3. Rolling thread|
|4. Hot treatment||5. Galvanize/Parkerising||6. Packing|
5. Quality control
A) Purchase 1022A materials from famous brand factories in China to ensure the quality.
B) Follow up the production of every procedure, strictly follow the ISO9001 standard.
C) Weigh test
D) Check size
D) Check size
E) Attack speed test
F)72-hours salt pray test
6. Packing & Shipment
A) 1kg/small bag, or 25kgs/woven bag, then bags or cartons loaded on pallet;
B) 1000pcs /800pcs/500pcs per small box, then small boxes into cartons;
C) Package can be customized as per client's requirement.
Shipping: By LCL or FCL Sea Shipment;