Self-Tapping Screws
Customized/ Type AB /Type B / S-Tite / P-Tite / B-Tite/ PT thread/ Hi-Lo thread / thread Cutting / forming thread

1. Material: Steel, Alloy steel, Stainless steel
2. Finish: according to you need (Cr3+Z, Cr3+ZY, Cr3+BZ, Cr3+ Real Yellow Zinc, Ni, Bo, Tin, Passivation, ZnFe, ZnNi, ...etc.)
3. Process Capability: Diameter M1.2 to M12 Length:3 to 80mm 
4. High quality and competitive prices
5. Prompt delivery time
6. Country of Origin: China / Taiwan
7. Rohs/Reach Compliant/Halogen Free Compliance 

There are two other types of screws with special thread design. The first type is High-Low Tapping Screws—used in plastic or other low-density materials. Double thread design, high thread (larger tooth outer diameter) has a flatter and sharper thread angle of 30 degrees. Low thread (smaller tooth outer diameter) has a thread angle of 60 degrees, tooth height is only high Half of the thread.

The combination design of high and low threads reduces the rotating torque, improves the pull-out strength, and greatly reduces the risk of fracture of the combined work piece. Another type is used in the assembly of drywall in the construction industry. The self-tapping screws with thread design are especially suitable for plastics, parts boards and wood.