Find a massive selection of high-quality Slotted Pan Head Tapping Screws Type C at DONGSHAO, a trusted, certified manufacturer from China. We deliver professional OEM/ODM solutions, factory-direct pricing, and comprehensive after-sales service.
Premium Material & Anti-Corrosion: Crafted from high-grade carbon steel or stainless steel, our screws undergo advanced surface treatments. They exhibit superior resistance to rust, oxidation, and wear, ensuring an extended service life in demanding environments.
Optimum Fastening Power: The classic slotted pan head design provides a clean aesthetic, a flat seating surface, and efficient torque transmission. It ensures a tight, flush fit between the screw and the fastened material, significantly enhancing holding force.
No Pre-Drilling Required (Type C): Featuring a specialized, precision-engineered sharp tip (Type C point), these screws effortlessly penetrate wood, plastics, and thin sheet metals. They tap their own threads seamlessly as they are driven, saving you valuable installation time and labor costs.
Low Maintenance & Smooth Finish: The flawless, burr-free surface finish makes cleaning and maintenance effortless, reducing dust accumulation in industrial applications.
| (mm) | ST2.2 | ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | ST8 | ST9.5 |
| P | 0.8 | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | 2.1 | 2.1 |
| a max | 0.8 | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | 2.1 | 2.1 |
| da max | 2.8 | 3.5 | 4.1 | 4.9 | 5.5 | 6.3 | 7.1 | 9.2 | 10.7 |
| dk max | 4 | 5.6 | 7 | 8 | 9.5 | 11 | 12 | 16 | 20 |
| dk min | 3.7 | 5.3 | 6.6 | 7.6 | 9.1 | 10.6 | 11.6 | 15.6 | 19.5 |
| k max | 1.3 | 1.8 | 2.1 | 2.4 | 3 | 3.2 | 3.6 | 4.8 | 6 |
| k min | 1.1 | 1.6 | 1.9 | 2.2 | 2.7 | 2.9 | 3.3 | 4.5 | 5.7 |
| n min | 0.56 | 0.86 | 1.06 | 1.26 | 1.26 | 1.66 | 1.66 | 2.06 | 2.56 |
| n max | 0.7 | 1 | 1.2 | 1.51 | 1.51 | 1.91 | 1.91 | 2.31 | 2.81 |
| r min | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.25 | 0.4 | 0.4 |
| t min | 0.5 | 0.7 | 0.8 | 1 | 1.2 | 1.3 | 1.4 | 1.9 | 2.4 |
Thanks to their high efficiency and robust tensile strength, our slotted pan head self-tapping screws are widely utilized across global industries:
Infrastructure & Civil Engineering: Bridges, highways, pipelines, and steel structures.
Renewable Energy: Photovoltaic (solar) mounting systems and wind power installations.
Heavy Machinery & Automotive: Machinery assembly, rail transit systems, and automotive manufacturing.
Construction & Decoration: Heavy-duty wood structures, commercial interior framing, and roofing.
Power & Mining: Electrical grids, nuclear power facilities, and mining equipment.
At DONGSHAO, we blend decades of manufacturing heritage with modern high-speed technology to guarantee flawless output.
State-of-the-Art Machinery: Our facilities are equipped with precision cold heading machines, pneumatic punching machines, hydraulic presses, wire rolling equipment, CNC lathes, and specialized heat treatment plants. We have recently integrated high-speed nut and bolt forming machines from Taiwan to dramatically scale up our high-end production capacity.
Rigorous Surface Treatment: Backed by our dedicated Dongke Metal Surface Treatment division, we provide uniform hot-dip galvanizing and premium coating solutions that exceed standard salt spray test benchmarks.
Secure Global Packaging: We prioritize moisture-proof, shock-proof, and anti-microbial packaging protocols. Every batch is secured to ensure your fasteners arrive in pristine condition, regardless of distance or climate challenges during maritime transport.
Established 1980s Heritage: Over 40 years of continuous growth. We have expanded into a massive group covering a 10,000+ square meter building facility, employing over 100 dedicated factory workers and more than 20 experienced engineering specialists.
Trusted Brand Credentials: Recognized multiple times as a 315 Excellent Credit Reference Demonstration Unit in Hebei Province, certifying our corporate integrity.
Global Export Footprint: Our products are trusted and highly praised by procurement managers across North America, Europe, South Asia, South America, Southeast Asia, and Africa.
Robust Project Portfolio: We are a verified long-term fastener vendor for major global contractors and state enterprises, including China Railway Groups, Sinohydro, and CFHI Heavy Industry.
We offer a smooth, stress-free purchasing experience tailored for overseas B2B buyers:
Pre-Sales Consultation: Professional technical consultations, product material options, and tailor-made blueprint analysis for custom/odd parts.
In-Sales Transparency: Streamlined order processing, proactive production scheduling, real-time logistics tracking, and reliable delivery coordination.
After-Sales Support: Technical guidance, on-site/remote application training, and responsive issue resolution to ensure you achieve long-term value from our fasteners.