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Precision Countersunk Head Screws from China - Flat Head Screw Suppliers & Factory Products
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
Flush installation for clean, smooth surfaces
Ideal for aesthetic or space-constrained applications
High tensile strength and corrosion resistance
Available in various drive types for versatile tooling
Suitable for wood, metal, and plastic materials
Precision threads ensure strong fastening and easy installation
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
- 10+ years of manufacturing experience in screws and fasteners.
- ISO 9001-certified factory with rigorous inspection procedures.
- Full range of screw types: pan head, CSK, hex, truss, and custom.
- Strong R&D capability for OEM/ODM solutions.
- Fast delivery, stable supply, and competitive pricing.
- Long-term export partnerships with clients in over 40 countries.
Frequently Asked Questions
What is the difference between a countersunk head screw and a flat head screw?
Essentially, they refer to the same type of screw. A countersunk head (CSK) screw features a flat top surface and a cone-shaped bearing surface designed to sit flush with or below the surface of the material.
What is the standard countersunk angle for your CSK screws?
Our standard countersunk screws generally feature a 90-degree angle under the head, which complies with standard DIN specifications. Custom angles (such as 82 degrees for ANSI standards) can also be manufactured upon request.
Which materials are best for outdoor or high-corrosion environments?
For outdoor or corrosive environments, we highly recommend Stainless Steel (SS304 or SS316). Alternatively, Carbon Steel with a Hot-Dip Galvanized (HDG) finish offers excellent protection.
Do you offer custom sizing and custom thread pitches?
Yes, we provide full OEM and ODM customization services. We can manufacture custom thread pitches, special lengths, and non-standard head dimensions according to your technical drawings.
What is your minimum order quantity (MOQ) and standard lead time?
MOQ varies depending on the size and material specifications. For standard in-stock items, we can ship immediately. For custom production runs, the lead time typically ranges from 7 to 30 days.