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Hexagon Head Self Tapping Screws.jpg

Hexagon Head Self Tapping Screw

Apply high torque without the drive bit slipping.

Tap strong threads directly into sheet metal.

Hex head design for secure, tool-friendly fastening.

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    Zinc Plated/ Dacromet hexagon head
    self tapping screws

    Apply high torque without the drive bit slipping.

    Tap strong threads directly into sheet metal.

    Hex head design for secure, tool-friendly fastening.

    Get a Quick Qoute

    01

    Sinsun Hexagon Head Self Tapping Screws: High-Torque Power, No Pre-Tapping

    Sinsun Hexagon Head Self Tapping Screws. Engineered for high-torque installation directly into metal without pre-tapped holes. Provides a secure, wrench-driven fastening solution for mechanical and structural applications. Corrosion-resistant finishes available. Request technical specifications.

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    Product Overview (Introduction)​

    Product Overview (Introduction)​

    Sinsun Hexagon Head Self Tapping Screws are the heavy-duty solution for mechanical assembly, metal framing, and applications where a secure, vibration-resistant connection is critical. 

    The hexagonal head (also called a hex washer head) is designed to be driven with a wrench or socket, allowing for significantly higher installation torque without the risk of cam-out or head stripping compared to Phillips or slotted drives. 

    Combined with a sharp, self-tapping point and durable threads, these screws eliminate the need for pre-tapped holes, streamlining the assembly of machinery, automotive components, heavy-duty storage, and structural metalwork.

    Explore Sinsun Hex Head Self Tapping Screws: Stainless, Coated, & Specialty Points

    stainless steel Hex Head Self Tapping Screw

    stainless steel hexagon head Self-tapping screws 

    These screws are made of Grade A2-304 or A4-316 stainless steel, which makes them naturally resistant to rust. They work well in coastal, chemical, and food-grade settings, where plated fasteners fail to hold up. The hex head lets you use regular wrenches or sockets to install it with a lot of torque.
    Hexagon Head Self Tapping Screws

    Type 17 Point Hex Head Self Tapping Screws

    Have a special "drill point" that works like an auger to pull the screw into wood and move material around. This design cuts down on wood splitting a lot more than standard points do. Mostly used for building with heavy-duty wood and framing with timber.
    Color Painted Hex Head Self Tapping Screws

    Color Painted Hex Head Self Tapping Screws

    Available in a range of standard and custom RAL colors. The paint coating offers basic corrosion protection (typically 100-200 hours salt spray test) and is mainly used for color-matching in architectural metalwork, appliances, or visible fixtures where aesthetics are key.
    Spoon Sword Point Hex Head Screw

    Spoon/ Sword Point Hex Head Screw

    It has a long, tapered, and sharp point that looks like the end of a spoon or sword. This shape makes it easier to get through and pilot tough or uneven materials. Usually used in automotive, HVAC, and assembly lines to pierce through metals that are already layered or have holes in them.
    Slotted Hex Head ScrewsSlotted Hex Head Screws

    Slotted Hex Self Tapping Screws

    Combine a standard hex head for primary wrench/socket drive with an additional slotted drive on top. This provides a dual-drive option for installation or removal in tight spaces where a full socket cannot fit, adding versatility for maintenance and field service.
    Dacromet hexagon head self tapping screws

    Dacromet Hexagon Head Self Tapping Screws

    Coated with a silver-gray, inorganic zinc-aluminum flake coating (Dacromet/Geomet). This provides superior corrosion resistance, typically exceeding 500 hours in salt spray tests, without hydrogen embrittlement risk. The coating is lubricious, aiding in consistent torque-tension relationship during installation.
    01

    Technical Specifications Table of Sinsun hex self tapping screws

    Specification Details / Options
    Material Medium Carbon Steel (Grade 4.8/8.8), Case-Hardened Steel, Stainless Steel (A2-70 / A4-80)
    Finish / Coating Zinc Plated (Blue/White), Electro-Galvanized, Zinc-Aluminum Flake Coating, Dacromet
    Head Style Hexagon Washer Head (HWH), Hex Flange Head
    Drive Type External Hex (Wrench/Socket Driven)
    Point Type Self-Tapping Point (Types: AB Point, Type 17 Point,Spoon Point for varying metal thickness)
    Thread Type Standard Self-Tapping Thread, Fine Thread for Metal
    Shank Diameter #8（4.2MM）#10（4.8MM）#12（5.5MM）#14（6.3.MM）
    Length 3/4" to 12" (19mm to 300mm) – various standard sizes
    Washer Integrated flat washer face under head; bonded sealing washer (EPDM) optional
    Standards Conforms to common industry dimensions (similar to ANSI/ASME B18.6.4, DIN 7504)
    Packaging Bulk boxes (by weight/piece count), cartons, or custom palletized loads

    hex head tapping screw - Detailed Size Chart

    This table covers the commonly used diameters from #8 to #14 and lengths from 3/4 inch to 12 inches (19mm to 300mm). Weights are approximate for carbon steel and can vary with head style and coating.

    Thread Diameter

    Nominal Diameter

    Standard Lengths (mm)

    Approx. Imperial Lengths

    Typical Applications by Length

    #8

    4.2 mm

    19, 25, 32, 38, 50

    3/4", 1", 1-1/4", 1-1/2", 2"

    Light-duty sheet metal, electrical enclosures, thin gauge brackets.

    #10

    4.8 mm

    25, 32, 38, 50, 64, 76

    1", 1-1/4", 1-1/2", 2", 2-1/2", 3"

    General metal fabrication, HVAC ducting, machinery guards, wood-to-metal fastening.

    #12

    5.5 mm

    32, 38, 50, 64, 76, 89, 102

    1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4"

    Structural steel connections, heavy-duty brackets, trailer assembly, purlin fastening.

    #14

    6.3 mm

    38, 50, 64, 76, 89, 102, 127, 152, 203, 254, 305

    1-1/2", 2", 2-1/2", 3", 3-1/2", 4", 5", 6", 8", 10", 12"

    Heavy construction, steel framework, securing large equipment, and penetrating thick insulation or multiple material layers.

     

    Notes on Application Selection

    Diameter & Strength

    Diameter determines shear and tensile strength. Choose #8/#10 for light loads and #12/#14 for structural loads.

    Length Rule

    Length Rule: The screw should be long enough to penetrate and fully engage the bottom material by at least 3-4 threads, plus account for any washers or non-structural layers.

    Material Thickness

    Material Thickness: For self-tapping into metal, the material thickness should generally be at least equal to the screw's diameter for optimal thread engagement. Our Type 17 point variants are optimized for wood.

    Recommendations for Your Product Page

    Visual Size Chart: Consider adding a diagram showing screw length versus grip range.
    Point Type Selection: Link this size chart to a guide explaining when to choose a TEK point (for metal), Type 17 point (for wood), or a Spoon Point.
    Coating Options: For each size, specify available coatings (e.g., Zinc, Dacromet, Stainless Steel) for different environments.
    Would you like me to elaborate on the coating specifications or create a selection guide flowchart for these screws based on application?

    hex washer head self tapping screw, highlighting advantages

    Structural Metal Framing & Assembly
    SCENARIO 01

    1.Structural Metal Framing & Assembly

    Ideal for constructing and joining steel studs, channels, and brackets. Hex heads allow for high-torque tightening using a wrench or impact driver, creating rigid, shake-proof connections without the need for pre-tapped holes.
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    Ductwork and sheet metal paneling
    SCENARIO 02

    2.Ductwork and sheet metal paneling:

    Great for putting up corrugated roofing, siding, and ductwork for heating and cooling. The self-tapping point easily pierces and threads sheet metal, and the wide hex washer head keeps the clamp tight and prevents pull-through in thin-gauge materials.
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    Mounting Heavy-Duty Machinery and Equipment
    SCENARIO 03

    3.Mounting Heavy-Duty Machinery and Equipment

    Used to hold machine guards, panels, and parts in place on equipment bases. The hex head, which works with a wrench, ensures that screws can be tightened securely and easily removed for maintenance, even in greasy or high-vibration places where Phillips heads might strip.
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    Putting Wood on Metal
    SCENARIO 04

    4.Putting Wood on Metal

    A flexible way to connect wooden frames, sleepers, or fixtures to steel beams or plates. The screw taps directly into the metal substrate, and the hex head gives the force needed to pull and hold the wood member tightly against the metal surface.
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    Frequently Asked Questions (FAQ)

      • 1

        Q: What is the main advantage of using hex head self tappers over Phillips head types?

        A: The primary advantage is superior torque transfer. An external wrench or socket grips the sides of the hex head, virtually eliminating cam-out (slippage) and allowing for much tighter, more secure fastening, especially in high-vibration applications.

      • 2

        Q: Are ‘hex head self tapping bolts’ the same as standard hex bolts?

        A: No. A standard hex bolt requires a pre-tapped hole or a nut. A hex head self tapping bolt features a thread-forming or thread-cutting point that creates its own mating threads as it is driven into a pre-drilled hole in materials like metal or plastic.

      • 3

        Q: Can I use any drill/driver for a screw with a self tapping hex head?

        A: Yes, the design offers tool flexibility. You can use a standard hex (Allen) key, a socket, a wrench, or a drill with a hex driver bit. This makes them ideal for both powered assembly lines and field maintenance where different tools are available.

      • 4

        Q: What thickness of material is a #14 hex head self tapping screw suitable for?

        A: A #14 hex head self tapping screw (approx. 6.3mm shank) is suitable for medium to heavy-gauge materials. For optimal strength, the material thickness should be at least equal to the screw’s diameter. It is commonly used for structural brackets and metal framing.

      • 5

        Q: Do I need a pilot hole for a #10 hex head self drilling screw?

        A: True self-drilling screws like the #10 hex head model are designed to drill their own pilot hole and tap threads in one step in materials up to their specified capacity (e.g., 12-gauge steel). No separate pre-drilling is required.

      • 6

        Q: What is the benefit of the washer on a hex washer head tapping screw?

        A: The integrated washer provides a larger bearing surface. This distributes clamping force over a wider area, protects the material surface from damage, and helps seal the hole against moisture when used with a bonded sealing washer.

      • 7

        Q: What is a ‘hex socket self tapping screw’ and where is it used?

        A: A hex socket self tapping screw (Socket Head Cap Screw) has an internal hex drive (Allen key) and a self-tapping point. It is used in precision machinery, automotive, and applications requiring a low-profile, high-strength fastener with clean aesthetics.

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