Grade 12.9 Black CSK Countersunk Head Self Tapping Drywall Screw Carbon Steel
Product Specifications
Attribute | Value |
Name | Metal Screw |
Standard | DIN, ASME, ANSI, ISO |
Material | Steel, Stainless steel, Brass, Copper, Titanium Alloy, Plastic |
Place of Origin | China |
Finish | Polish, Passivation, Black, Galvanization, Chromate, Dacromet |
Certificate | ISO9001:2008, ROHS |
Used | Building Industry Machinery |
Thread Type | Coarse, Fine |
Usage | Fastening |
Function | Connection, Fastening and Decoration |
Strength | High |
Size | Various sizes available |
Measurement System | INCH, Metric system |
Product Description
Carbon Steel Grade 12.9 Black CSK Countersunk Head Self Tapping Drywall Screw
Key Features
- Phosphating dry-wall screws offer superior lubricity and faster penetration speed
- Available in black phosphating (better attack speed) or blue-white zinc (better rust resistance)
- Precision grade typically 6g (Class 2) for industrial applications
- Single-line coarse-thread design provides faster tapping speed and better wood preservation
- Ideal alternative to double-line fine-threaded screws for wooden keel connections
Applications
Industry | Use Case |
Automotive | High-strength applications in engines, heavy-duty machinery, and bridge construction |
Mechanical | Connecting mechanical parts, circuit boards, engines, transmissions, and building structures |
Energy | Connecting power generation equipment and transmission line fixtures |
Construction | Building structures, shipbuilding, and petrochemical equipment connections |
Material Specifications
Material | Characteristics |
Aluminum | Excellent thermal/electrical conductivity but requires careful processing |
Titanium | Requires EDM machining with deionized water medium |
Steel | High strength but generates significant heat during processing |
Brass | High tensile strength but requires slow cutting speed |
Product Images
Frequently Asked Questions
Q: Are you trading company or manufacturer?
A: We are factory and OEM are available.
Q: How long is your delivery time?
A: Generally 7-10 days if in stock, or 15-20 days if not in stock, depending on quantity.
Q: Do you provide samples? Is it free or extra?
A: Yes, we offer free samples but the customer pays for freight.
Q: What are your payment terms?
A: 30% T/T in advance, balance before shipment or L/C.