China Suppliers Factory 410/304 Stainless Steel Countersunk Self-Drilling Screws - Cross Flat Head Self-Tapping Drill Tail Screws

Introducing our premium Stainless Steel Countersunk Phillips Self-Drilling Tek Screws, expertly manufactured from high-quality 410 and 304 stainless steel. These screws adhere to international standards including DIN 7504P and ANSI/ASME, ensuring superior performance and durability. With a variety of sizes available, including M3.5, M4.2, M4.8, M5.5, and M6.3 (American Standard #6, #8, #10, #12, #14), and lengths ranging from 13mm to 120mm, we cater to diverse applications, Our screws feature a self-drilling design that eliminates the need for pre-drilling, while the countersunk head offers a sleek and flush finish. The tight-threaded anti-slip interlocking guarantee enhances their performance in various settings. Additionally, our mirror passivation treatment provides excellent rust prevention, making them ideal for outdoor use, These high-quality screws are suitable for a multitude of applications, including light steel keel and steel structure ceilings, furniture assembly, metal doors and windows installation, automobile manufacturing, and outdoor advertising, As a leading China supplier and factory, we pride ourselves on delivering exceptional products with a delivery time of 15-30 days upon receipt of advance payment. We also offer a minimum order quantity of 10,000 pieces, which can be negotiated based on your needs. Samples are available for your evaluation, and we provide flexible packaging options, including boxed, bulk, pallet, or customized solutions. OEM services are also available to ensure your specific requirements are met

304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01

304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws02

Key Features

Our self-tapping screws are crafted from food-grade 304 stainless steel and treated to achieve metric Grade 12.9 ultra-high strength, overcoming the traditional hardness limitations of standard stainless steel. Featuring a countersunk Phillips head design, these screws can be installed flush with the workpiece surface for a zero-profile finish, making them ideal for precision electronics and architectural decoration. We have optimized the thread geometry for different substrates (metal, wood) to ensure low-torque driving with high-torque clamping, effectively preventing stripping. As a superior alternative to standard Tek screws, these fasteners perform exceptionally well in thin sheet metal connections, providing an intelligent fastening solution that balances aesthetics with high load-bearing capacity.

304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws03

304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws04

Precision Manufacturing Process

From wire rod to finished product, we strictly adhere to multiple international standards including ISO, DIN, ANSI, and GB. Utilizing multi-station cold forging technology, we ensure shank diameter tolerances are controlled within microns. Threads are formed through a precision thread rolling process to enhance fastening force. For non-standard requirements, we employ optical imaging sorters to reject minute defects like head cracks. In post-treatment, we offer a wide range of surface finishing options: from conventional zinc plating and nickel plating to highly corrosion-resistant Hot-Dip Galvanizing (H.D.G.), as well as decorative polishing and black anodizing. We even provide food-grade passivation treatment, ensuring every screw has a prolonged fatigue life in demanding environments.

Transparency & Customization

As a source factory, we are committed to breaking down the information barriers of traditional trade. From mill certificates for raw materials to hardness grades (covering Grade 4.8 to Grade 12.9, as well as A2-70 and A4-80 marine-grade stainless steel), all test data is traceable. We support full-chain customization: dimensionally, we can adjust thread length and head thickness according to drawings; functionally, we can combine processes like sandblasting, electrophoretic coating (e-coating) , or chrome plating. Whether you need British Standard (BS) fasteners or require a special colored anodized finish, we offer small-batch sampling. This ensures that when you purchase fasteners from us, you not only receive high-quality products but also full transparency and control over the entire process, from material selection to packaging.

Intelligent Warehousing Services for Fasteners

No Pre-Drilling · Rust Resistant · More Secure

This stainless steel Phillips countersunk self-tapping screw, with its rust-resistant and corrosion-resistant material, one-step self-tapping design, and aesthetically pleasing countersunk head structure, has become the preferred solution for metal substrate fastening scenarios that is efficient, reliable, and aesthetically pleasing.

Product Details

Manufacturing Process

Multi Station Cold Heading Technology
Intelligent Heat Treatment System
Micron-Level Thread Rolling Process
Fully Automatic Optical Sorting
Environmentally Friendly Surface Treatment Line
Metallographic And Mechanical Joint Laboratory

Quality Control System

Raw Material Source Locking
Furnace Number Batch Full Traceability
Third Party Material Certification
Process Parameters Open And Transparent
Salt Spray Test Real Time Monitoring
International Standard Compliance Declaration

Customization

Customizable head/slot Shapes
Extreme Application Of Special Materials
Breakthroughs In Extra Large/Long Specifications
Integrated Assembly Of Components
Customizable Surface Treatment Colors
Personalized Packaging And Labeling

Technical Service

On-Site Failure Analysis
Selection Calculation And BOM Optimization
Installation Tool Selection Guidance
Inventory Management (VMI) Trusteeship
Free Sample Making And Testing
International Standard Translation

Dual Stainless Steel Options – High Hardness or Superior Corrosion Resistance

Available in 410 and 304 stainless steel. 410 grade, heat-treated for high hardness, delivers high driving torque to penetrate thick steel sheets and light-gauge studs without tip wear or breakage; 304 grade (A2-70) offers excellent corrosion resistance for damp, salt-spray, and outdoor environments – rust-free for decades. One screw, two materials – choose according to working conditions, meeting both hardness and anti-corrosion needs.

Self-Drilling Tip – No Pre-Drilling, Efficient One-Step Installation

The built-in self-drilling tip penetrates light-gauge steel, thin metal sheets, aluminum profiles, and sheet metal directly – no pre-drilling or punching needed. An electric driver completes drilling, tapping, and fastening in one step – several times faster than conventional self-tapping screws. Ideal for high-volume assembly in drywall framing, metal windows/curtain walls, and automotive manufacturing – significantly boosting productivity.

Countersunk Flat Head – Flush Fit, Aesthetic & Non-Interfering

The countersunk flat head fully embeds into the workpiece surface, sitting flush with metal panels, profiles, or curtain walls – no protrusion, sleek appearance, and no interference with subsequent painting, film application, or decorative finishing. Burr-free head prevents scratching of operators and materials. Tight threads provide anti-slip locking against vibration, maintaining clamping force long-term – perfect for furniture sheet metal, signboards, and other high-aesthetic applications.

Factory Environment

High-Quality Stainless Steel Self-Tapping Screw Display

Frequently Asked Questions

What is the main difference between 304 and 410 stainless steel self-tapping screws?

Grade 410 stainless steel is heat-treated to achieve superior hardness, making it ideal for penetrating thick steel sheets without tip breakage. Grade 304 (A2-70) offers maximum resistance to corrosion, rust, and salt spray, making it suitable for long-term outdoor or humid environments.

Do these self-drilling screws require pre-drilled pilot holes?

No, the built-in self-drilling tip design eliminates the need for pre-drilling or punching. An electric screwdriver can perform drilling, thread tapping, and fastening seamlessly in a single step.

What are the structural advantages of a countersunk flat head screw?

The countersunk flat head sits completely flush with the material surface upon installation. This ensures a clean, aesthetically pleasing finish without protrusions that might interfere with surface coatings or mechanical assemblies.

Can head styles, sizes, or surface treatments be customized?

Yes, we provide flexible customization services including special head/slot geometry, extra-long or large dimensions, custom surface coating colors, and personalized packaging and labeling.

How do you ensure manufacturing quality and batch consistency?

We maintain strict quality control through locked raw material sources, full furnace number batch traceability, automated optical sorting, real-time salt spray monitoring, and third-party material certifications.

Do you provide free samples and technical support before ordering?

Yes, we offer free sample making and testing, alongside comprehensive technical support such as installation guidance, failure analysis, and BOM selection calculations.