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China Suppliers of Precision Countersunk Head Screws | Flat Head CSK Screws Factory for Smooth Surface Applications
Product Overview
| Product Name | Countersunk Head Screw / Flat Head Screw / CSK Screw |
| Head Type | 90° Flat Head, Countersunk Head |
| Drive Type | Phillips / Slotted / Torx / Hex Socket |
| Standards | DIN 965, DIN 7991, ISO 10642, ANSI B18.3, or customized |
| Material | Carbon Steel |
| Stainless Steel (SS201, SS304, SS316) | |
| Alloy Steel | |
| Brass / Aluminum (optional) | |
| Grade | 4.8, 8.8, 10.9, 12.9 / A2-70, A4-80 |
| Surface Finish | Zinc Plated (Clear / Yellow / Blue) |
| Black Oxide | |
| Nickel / Chrome Plated | |
| Hot-Dip Galvanized (HDG) | |
| Plain / Polished | |
| Size Range | Metric: M2 – M24 |
| Inch: #4 – 1" | |
| Custom lengths and thread pitches available |
Product Features
Applications
Furniture and cabinetry
Mechanical and electronic enclosures
Automotive interior components
Electrical devices and appliances
Aerospace and marine hardware
Construction and architectural fittings
Packaging & Delivery
| Packaging | Bulk in cartons with pallets |
| Small boxes, plastic trays, or custom branding | |
| Lead Time | 7–30 days depending on stock and order size |
| Shipping Port | Tianjin, China |
Why Choose Hebei Chudu
Frequently Asked Questions
What is the difference between a countersunk head screw and a flat head screw?
A countersunk head screw and a flat head screw (often called a CSK screw) refer to the same design. They feature a flat top surface and a cone-shaped bearing surface (usually 90 degrees) that allows the screw to sit flush with or below the surface of the material.
Which standards do your CSK screws comply with?
Our countersunk screws are manufactured in strict compliance with international standards, including DIN 965, DIN 7991, ISO 10642, and ANSI B18.3. Custom standards and specifications are also available upon request.
What materials and grades do you offer for flat head screws?
We supply screws in Carbon Steel, Stainless Steel (SS201, SS304, SS316), Alloy Steel, and optional Brass or Aluminum. Available grades include 4.8, 8.8, 10.9, 12.9 for steel, and A2-70, A4-80 for stainless steel.
What types of surface finishes can be applied?
To meet various corrosion resistance requirements, we provide multiple surface finishes: Zinc Plated (Clear, Yellow, Blue), Black Oxide, Nickel or Chrome Plated, Hot-Dip Galvanized (HDG), and Plain/Polished finishes.
Can you customize the sizes, lengths, and thread pitches?
Yes, we offer a comprehensive size range from Metric M2 to M24 and Inch #4 to 1". Custom lengths, thread pitches, and specialized drive configurations can be fully customized by our R&D team.
What is your typical lead time and shipping port?
Our standard lead time ranges from 7 to 30 days, depending on stock availability and order volume. All orders are securely packaged and shipped directly from Tianjin Port, China.