Self-Tapping Screws Manufacturer
MT.BOLTS manufactures self-tapping screws, which are versatile fasteners engineered to tap their own threads into materials such as metal, plastic, or wood during installation. These screws eliminate the need for pre-threaded holes, making them highly efficient for quick assembly. Self-tapping screws are widely used in construction, manufacturing, automotive, and electronics industries where secure and precise fastening is required. MT.BOLTS offers self-tapping screws in a variety of types, materials, head styles, and surface finishes to meet diverse application needs.
- System of Measurement:
- Metric: M2 – M12
- Imperial: #4 to 1/2″
- Length Range:
- Metric: 6 mm to 150 mm
Imperial: 1/4″ to 6″ - Standards:
- DIN 7981 / 7982 / 7504 – Self-tapping screws with various head styles
- ISO 7049 / 7050 / 7051 – International tapping screw standards
- ASME B18.6.4 – Inch-series tapping screws
- SAE J78 – Self-tapping screw types and performance
- Custom/OEM specifications – Available for specialized industrial use
Self-Tapping Screws Material Types
MT.BOLTS supplies carbon steel, stainless steel, duplex steel, and nickel-based alloy Self-Tapping Screws, meeting the demanding requirements of chemical, marine, and high-temperature environments, compliant with various international standards.
| Material Category | Common Grades/Models | Description |
| Carbon Steel | ASTM A307, A325, A490 | High strength and cost-effective, suitable for general structures; requires anti-corrosion coating. |
| Stainless Steel | 304 (A2), 316 (A4), 321, 410 | Excellent corrosion resistance; widely used in food, chemical, and construction industries |
| Duplex Stainless Steel | UNS S31803/S32205 (F51), UNS S32750 (F53) | High strength with superior chloride corrosion resistance; used in seawater, petrochemical, and paper industries |
| Monel Alloys | Monel 400, Monel K500 | Excellent seawater corrosion resistance and mechanical strength; used in marine engineering and pump systems |
| Hastelloy Alloys | Hastelloy C276, C22, B2, X | Excellent resistance to strong acids and oxidizing media; widely used in chemical equipment and flue gas desulfurization |
| Inconel Alloys | Inconel 600, 625, 718 | Resistant to high temperature, pressure, and corrosion; used in heat exchangers, aerospace, and nuclear industries |
| Incoloy Alloys | Incoloy 800, 825, 925 | Ideal for high-temperature acidic environments; widely used in petroleum refining and heat treating systems |
| Nickel Alloys | Nickel 200, 201 | Pure or high-nickel alloys with excellent conductivity and alkali resistance; used in electronics and chemical applications |
Self-Tapping Screws System of Measurement
- System of Measurement: Metric: M2 – M12, Imperial: #4 to 1/2″
- Length Range: Metric: 6 mm to 150 mm, Imperial: 1/4″ to 6″
- Thread Type: Full thread, Self-forming or self-cutting thread, Tapping thread profiles (Type A, AB, B, C, D, F, G, 25, etc.)
- Head Types: Pan Head, Flat Head, Hex Washer Head, Oval Head, Truss Head, Button Head
- Drive Types: Phillips, Slotted, Pozi, Torx (Star), Hex Socket, Combination Drive
- Point Types: Sharp Point (for wood, plastic), Drill Point (Self-drilling), Blunt Point (for thin sheet metal)
Self-Tapping Screws Common Standards
Self-tapping screws are produced according to a variety of international and regional standards to ensure consistency in dimensions, performance, and material requirements:
- DIN 7981 / 7982 / 7983 / 7504 – German standards for pan head, countersunk head, and hex washer head self-tapping screws.
- ISO 7049 / 7050 / 7051 – International equivalents for tapping screws with cross recess drives.
- ASME B18.6.4 – Inch-series tapping screws standard covering head types and drives.
- SAE J78 – Standard for mechanical and performance requirements of self-tapping screws.
- JIS B1122 – Japanese standard for tapping screws used in local markets.
- Custom / OEM Specifications – For industry-specific applications (e.g., electronics, automotive).
Self-Tapping Screwss Surface Finishes
- Zinc-plated – Corrosion resistance in indoor environments
- Hot-dip galvanized – Excellent protection in outdoor/marine use
- Black oxide – Mild corrosion resistance, often for aesthetic or indoor use
- Passivated – Used on stainless steel bolts to improve corrosion resistance
- Custom Coatings (e.g., PTFE) – Non-stick, chemical-resistant for harsh environments
Why Choose MT.BOLTS
- Material Diversity
- Standardized Production
- Ample Inventory
- Competitive Pricing
- Low-MOQ Customization
Benefits and Limitations of Self-Tapping Screws
Advantages
- No Pre-threading Required: Screws cut their own threads, saving time and labor.
- Versatile: Can be used in metal, wood, plastic, and thin sheet materials.
- Strong Thread Engagement: Securely fastens into base materials.
- Wide Availability: Offered in various head styles, sizes, and finishes.
- Cost-Effective: Reduces the need for additional tapping tools or pre-threaded inserts.
Disadvantages
- Not Suitable for Repeated Assembly: Threads may wear out in softer materials.
- Can Strip Threads: Over-tightening may damage the tapped hole.
- Not Ideal for High-Vibration Applications: May loosen over time without locking features.
- Material Limitations: Performance may vary in very hard or very brittle substrates.
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Self-Tapping Screws Applications
Self-tapping screws are widely used in a range of industries and applications:
- Sheet Metal Fabrication: HVAC ducts, enclosures, metal frames.
- Construction: Drywall attachment, roofing sheets, wood-to-metal fastening.
- Automotive & Machinery: Fastening interior panels, brackets, and light structural parts.
- Electrical & Electronics: Circuit boards, panel covers, terminals.
- Furniture Manufacturing: Assembly of wooden and plastic furniture components.
- DIY & Home Repair: General-purpose fastening in repairs and installations.
FAQ About Self-Tapping Screws
Self-tapping screws form threads in pre-drilled holes; self-drilling screws have a drill-like point that creates the hole and forms threads in one action.
Often yes—especially in hard materials like metal—but in soft materials (like wood or plastic), they may go in directly.
Limited reuse is possible, but the thread strength may degrade with each use.
Typically no—they’re best for fastening and light to moderate structural support. For load-bearing, bolts or specialty fasteners are preferred.
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