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Home / Products / Screws / Self-Tapping Screws

Stainless Steel Self Tapping Screws Manufacturers

Screws are fasteners that can directly cut into materials and form internal threads without pre-drilling.

Key features:

Point Design: Typically equipped with sharp conical or drill-tail points to facilitate material penetration and minimize the need for pilot holes
Thread Geometry: Characterized by deep, widely spaced threads with strong cutting capabilities, enabling self-threading in plastics, thin metals and other materials

Typical applications:

Fastening color-coated steel plates, light steel keels, and insulation materials
Assembling wooden and plastic components (e.g., cabinets, electrical enclosures)
Securing automotive body panels and circuit boards (requires anti-static treatment)
Installing fences and billboards (requires waterproof or high corrosion-resistant screws)

Hexagonal Large Flange Self Tapping Screw

Hexagonal Large Flange Self Tapping Screw
Pan Head Sharp Point Self-Tapping Screws

Pan Head Sharp Point Self-Tapping Screws
Countersunk Head Sharp Point Self-Tapping Screws

Countersunk Head Sharp Point Self-Tapping Screws
Hexagon Head Sharp Point Self-Tapping Screws

Hexagon Head Sharp Point Self-Tapping Screws
Other Head Types

Other Head Types
Hex Washer Head Buttress Thread Type 17 Self Tapping Screw With EPDM Washer

Hex Washer Head Buttress Thread Type 17 Self Tapping Screw With EPDM Washer
Round Head Six Lobe Type 17 Self Tapping Screw Right And Left Thread

Round Head Six Lobe Type 17 Self Tapping Screw Right And Left Thread
Hex Head Self Tapping Screw

Hex Head Self Tapping Screw
CSK Head Six Lobe Tamper Proof Self Tapping Screw

CSK Head Six Lobe Tamper Proof Self Tapping Screw
Round Washer Head Six Lobe Self Tapping Screw

Round Washer Head Six Lobe Self Tapping Screw
Little Pan Head Six Lobe Self Tapping Screw

Little Pan Head Six Lobe Self Tapping Screw
Jiaxing Zhongke Metal Technology Co.,Ltd.
Jiaxing Zhongke Metal Technology Co.,Ltd. is located in Xinfeng Town Industrial Park, Nanhu District, Jiaxing City, Zhejiang Province. It is a manufacturer integrating the development, design and manufacturing of heat treatment equipment. At the same time, due to the advantages in the heat treatment industry, it also takes into account the development of general parts, automotive parts, and stainless steel high-strength fasteners. Design, development, and manufacturing, and open to the outside world for heat treatment process design and processing of various metal materials. We are Custom Stainless Steel Self Tapping Screws Manufacturers and China OEM/ODM Stainless Steel Self Tapping Screws Factory. The company has strong financial and technical strength, complete production equipment, scientific testing methods, and a perfect management team. "Quality-oriented, technological innovation" is our purpose, and adhering to the concept of "service first, honesty and trustworthiness", to provide customers with diversified and reliable products.
  • 2001

    Founded in

  • 17 acres+

    Covered area

  • 100+

    Manufacturing equipment

  • 200+

    Number of employees

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Self-Tapping Screws Industry knowledge Section

Stainless Steel Self Tapping Screws: Engineering Excellence for Secure Fastening

Stainless steel self tapping screws are essential components in modern manufacturing and construction, designed to create their own mating threads when driven into pre-drilled or pre-punched holes. Unlike self drilling screws, these fasteners require a pilot hole but offer superior thread engagement and holding power, making them ideal for applications where joint integrity and vibration resistance are critical.

The unique value of stainless steel self tapping screws lies in their ability to combine the corrosion resistance of austenitic stainless steels with the mechanical performance required for demanding applications. The work hardening characteristics of stainless steel grades such as 304 and 316 provide excellent strength and durability, while the self tapping thread design ensures efficient installation and reliable long-term performance.

Metallurgical Properties of Stainless Steel Grades

The selection of appropriate stainless steel grade significantly influences the performance characteristics of self tapping screws. Grade 304 stainless steel, the most commonly used austenitic alloy, offers excellent corrosion resistance and formability for general purpose applications. For more aggressive environments, Grade 316 provides enhanced resistance to chlorides and acids through the addition of molybdenum, making it suitable for marine and chemical processing applications.

Through careful material selection and processing, manufacturers can achieve the optimal balance between hardness for thread forming and ductility to prevent fracture during installation. Our expertise in metallurgy ensures that each fastener delivers consistent performance, with mechanical properties meeting or exceeding industry standards such as ASTM F837 and ISO 3506.

Thread Types and Application Matching

Selecting the correct thread configuration is essential for achieving optimal fastening performance. Different thread designs are engineered to handle specific material types, thicknesses, and application requirements. The table below outlines common thread configurations and their recommended applications.

Thread Type Thread Forming Feature Recommended Materials Typical Applications
Type A (Tapping) Sharp threads with tapered point Thin sheet metal, aluminium, plastics HVAC ductwork, electrical enclosures, light assemblies
Type AB (Self Tapping) Fine threads with blunt point Thicker sheet metal, die castings, structural steel Automotive components, heavy equipment, structural connections
Type B (Thread Forming) Specialised lobe geometry for low torque Soft metals, thermoplastics, composites Electronics housings, medical devices, consumer products
Type C (Thread Cutting) Cutting edge for chip removal Hardened steels, stainless steel, cast iron Machine tooling, industrial equipment, pipe flanges

Surface Finishes and Corrosion Protection

While stainless steel inherently provides corrosion resistance, surface finishing can enhance performance for specific applications. Standard mill finishes offer reliable protection for most indoor applications. For enhanced durability and aesthetics, we offer various surface treatments including mechanical polishing, electropolishing, and passivation processes that remove surface contaminants and improve the passive oxide layer.

Our quality control processes include regular salt spray testing to verify corrosion resistance, ensuring that every batch meets the stringent requirements of international standards. For applications demanding specific aesthetic or functional characteristics, we provide custom finishing options tailored to customer specifications.

Heat Treatment and Work Hardening

The unique characteristic of austenitic stainless steels is their ability to work harden during cold forming operations such as thread rolling. This phenomenon increases the surface hardness and tensile strength of the fastener without the need for subsequent heat treatment. Our manufacturing processes leverage this property through precise control of forming parameters, ensuring consistent hardening and optimal mechanical properties.

While heat treatment is not typically applied to standard austenitic stainless steels, we do offer stress relieving operations for specific applications to reduce residual stress and improve dimensional stability. This comprehensive approach to material processing reflects our deep understanding of metallurgy and commitment to delivering superior quality products.

Quality Assurance and Testing Protocols

Quality consistency is fundamental to our manufacturing philosophy. Our comprehensive quality management system encompasses in-process inspections at every stage of production, from raw material certification through final packaging. Mechanical property verification includes torque-tension testing, microhardness measurement, and thread gauge inspection to ensure dimensional accuracy and performance consistency.

Each production batch is assigned a unique traceability code, linking it to raw material certificates and process parameters. This complete traceability enables prompt issue resolution and continuous improvement, reflecting our commitment to manufacturing excellence for export markets.

Frequently Asked Questions

Q1: What is the difference between a self tapping screw and a self drilling screw?
A self tapping screw requires a pre-drilled pilot hole and forms threads as it is driven into the material. A self drilling screw has an integrated drill point that creates its own hole, eliminating the need for a pilot hole. Self tapping screws generally provide stronger thread engagement and are preferred for applications requiring high pull-out resistance.
Q2: What pilot hole size should be used for stainless steel self tapping screws?
The appropriate pilot hole size depends on the screw diameter, thread type, and base material hardness. As a general guideline, the pilot hole diameter should be approximately 75% to 85% of the screw diameter for sheet metal applications. Our technical team provides application-specific recommendations to ensure optimal thread engagement and prevent material distortion.
Q3: Which stainless steel grade is best for my application?
Grade 304 is suitable for most general applications offering good corrosion resistance and formability. Grade 316 provides enhanced resistance to chlorides and acidic environments, making it ideal for marine, chemical, and food processing applications. For high-temperature applications, we recommend consulting our engineering team for grade selection guidance.
Q4: Can stainless steel self tapping screws be used in galvanic corrosion applications?
Stainless steel is cathodic to most other metals and can cause galvanic corrosion when in contact with dissimilar metals in electrolyte environments. We recommend using stainless steel fasteners with compatible material combinations or applying anti-corrosion barrier coatings to isolate dissimilar metal contact. Our technical team provides material compatibility guidance for specific applications.
Q5: What quality standards do your stainless steel self tapping screws meet?
Our manufacturing processes are certified to ISO 9001:2015. We routinely test our products to ASTM F837, ISO 3506, and SAE J81 standards. Each shipment includes material test reports, dimensional inspection records, and mechanical property verification data. Third-party inspections can be arranged upon request.

Jiaxing Zhongke Metal Technology Co., Ltd. brings decades of metallurgical expertise and precision manufacturing capabilities to the production of stainless steel self tapping screws. Our integrated approach, from raw material selection to final quality verification, ensures that each fastener delivers consistent, reliable performance for export customers worldwide.