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Black Concrete Screws

Black coating means low visibility            
Blend with dark surfaces            
Same holding power    

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    black concrete screws

    Black coating means low visibility

    Blend with dark surfaces

    Same holding power

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    01

    Sinsun Black Concrete Screws: Discreet Anchoring for Finished Masonry

    Sinsun black concrete screws with corrosion-resistant black coating. 3/16" to 1/2" diameters. Low-profile head blends with dark surfaces. Ideal for security, signage, and architectural applications. Factory direct pricing. Request samples.

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    Sinsun Black Concrete Screws​: When Appearance Matters as Much as Strength

    Sinsun Black Concrete Screws When Appearance Matters as Much as Strength

    We have been providing standard blue concrete screws to construction sites across the globe since 2006. However, some uses require different appearances.

    A particular issue—visible fasteners on dark surfaces—is resolved by dark concrete screws. Like a beacon, a bright silver or blue screw sticks out of architectural concrete, dark wood, or black-painted steel. Because of the black coating, the fastener blends in with the surroundings.

    There is more to the coating than meets the eye. For both indoor and protected outdoor applications, it offers corrosion resistance while removing reflected glare that highlights fasteners.

    Sinsun produces black concrete screws using the same production lines as blue screws. The same thermal treatment. Similar thread geometry. Identifiable quality control Only the finish matters.

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    What Are Black Concrete Screws?

    Black concrete screws are masonry anchors that tap themselves and have a black coating that protects them from rust. They function similarly to regular blue concrete screws: drill a pilot hole, clean it, and drive the screw. The black finish gives them:

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    • - Not being easily visible on dark surfaces
    • - Reduced glare in finished areas
    • - Reduced glare in finished areas
    • - Reduced glare in finished areas

    Important features

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    Thread-cutting design: makes threads in the base material instead of just fitting together by friction.
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    Removable: It can be unscrewed and used again.
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    Black coating:protects against rust and gives a matte look
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    There are different head styles to choose from, such as hex, flat countersunk, and pan head.

    Depending on the series, the black coating is usually a black oxide or black organic coating. It's good for use inside and in protected areas outside.​​

    Product Types

    Hex Head Black Concrete Screws
    01

    Hex Head Black Concrete Screws

    Black hex head concrete screws are preferred by contractors when installation torque is crucial.The external hex drive works with any standard socket or nut driver, giving you the most rotational force without the risk of cam-outs or drive stripping. For high-volume jobs like fastening metal tracks, wood furring strips, and equipment brackets where speed and dependability are important, they are the most suitable choice.The built-in hex washer head gives you a large bearing surface that evenly spreads the clamping force, preventing pull-through in soft materials. Sinsun makes these using the same heat-treated steel and black corrosion-resistant coating as our regular line. This makes sure that the head shape matches the holding power.
    Flat Head Black Concrete Screws
    01

    Flat Head Black Concrete Screws

    When the fastener needs to sit level with the surface of the material being mounted, flat head black concrete screws are used. The 90-degree countersunk head design lets the screw fit all the way into the fixture, making a smooth, snag-free finish that is perfect for architectural woodwork, signs, and security uses. The black coating makes sure that the screw head blends in with dark materials instead of reflecting light like a regular fastener. The deep Phillips or Torx drive recess on the Sinsun flat heads keeps the screw engage even when driving at the shallow angle needed for flush mounting. We have these in our low-profile LP series for situations where the main goal is to have as little visual impact as possible.
    Black Star Drive Concrete Screws
    01

    Star Drive Black Concrete Screws

    Star-drive black concrete screws eliminate bit slippage and stripped heads. Torx drive designs have six contact points between the driver's bit and the screw head. In this way, torque is evenly distributed, so you can install things faster without having to worry about cam-out.This drive type is especially useful in production settings where bit life and steady driving are critical.Because of the depth and shape of the star recess, T-25, T-30, and T-40 bits can be inserted, depending on the screw size. Sinsun star drive screws are the right choice for installers who have switched from Phillips or slotted drives and never want to return. They have an efficient drive system and a black coating that protects against rust.

    Full Specifications and Technical Information
    for All Black Concrete Screws

    We test all technical parameters in our own lab, which has 18 precision testing machines, and we also have them checked by outside organizations. There is a dimension tolerance of ±0.05mm for diameter and ±0.1mm for length, so each batch will be the same. When you order in bulk, you can choose the diameter, length, and coating thickness you want. We also offer detailed technical support to ensure your project meets your needs. Black oxide coating meets RoHS, REACH, and ASTM B117, making it suitable for markets worldwide.​
    Head Type Thread Type Material Diameter (mm) Length (mm) Drill Bit Diameter (mm) (Self Drilling Only) Embedment Depth (mm, Min) Tensile Strength (kN, Non-Cracked Concrete) Shear Strength (kN) Drive Type (Star Drive = Torx) Drilling Speed (rpm, Max) (Self Drilling Only) Weight per 1000 Pcs (kg) Coating Thickness (μm)
    Hex Head (External Hex Drive) Self-Tapping, Triple-Thread C1022 Carbon Steel / 304 Stainless Steel 6 50-100 5.5 40 7.8-12.2 5.2-7.8 Hex Key (8mm), Standard Socket Compatible 1500 12.8 10-12
    Hex Head (External Hex Drive) Self-Tapping, Triple-Thread C1022 Carbon Steel / 304/316 Stainless Steel 8 70-160 7.5 60 14.5-21.0 8.7-12.5 Hex Key (10mm), Standard Socket Compatible 1200 28.5 11-13
    Hex Head (External Hex Drive) Self-Tapping, Coarse Thread C1022 Carbon Steel / 304 Stainless Steel 6 50-100 - 40 7.6-11.9 5.0-7.6 Hex Key (8mm), Standard Socket Compatible - 12.6 10-12
    Hex Head (External Hex Drive) Self-Tapping, Coarse Thread C1022 Carbon Steel / 304/316 Stainless Steel 8 70-160 - 60 14.2-20.8 8.5-12.3 Hex Key (10mm), Standard Socket Compatible - 28.3 11-13
    Flat Head (90° Countersunk, Flush Mount) Self-Tapping, Triple-Thread C1022 Carbon Steel / 304 Stainless Steel 6 50-100 5.5 40 7.5-11.7 4.9-7.5 T30 Torx (Star Drive), Deep Recess 1500 12.4 10-12
    Flat Head (90° Countersunk, Flush Mount) Self-Tapping, Triple-Thread C1022 Carbon Steel / 304/316 Stainless Steel 8 70-160 7.5 60 14.0-20.5 8.3-12.1 T30 Torx (Star Drive), Deep Recess 1200 28.1 11-13
    Flat Head (90° Countersunk, Flush Mount) Self-Tapping, Coarse Thread C1022 Carbon Steel / 304 Stainless Steel 6 50-100 - 40 7.3-11.5 4.8-7.4 T30 Torx (Star Drive), Deep Recess - 12.2 10-12
    Flat Head (90° Countersunk, Flush Mount) Self-Tapping, Coarse Thread C1022 Carbon Steel / 304/316 Stainless Steel 8 70-160 - 60 13.8-20.3 8.1-11.9 T30 Torx (Star Drive), Deep Recess - 27.9 11-13
    Hex Head (External Hex Drive) Self-Tapping, Triple-Thread C1022 Carbon Steel / 304/316 Stainless Steel 10 90-260 9.5 80 18.8-28.5 13.6-18.3 Hex Key (12mm), Standard Socket Compatible 1000 51.2 12-15
    Flat Head (90° Countersunk, Flush Mount) Self-Tapping, Coarse Thread C1022 Carbon Steel / 304/316 Stainless Steel 10 90-260 - 80 18.5-28.2 13.4-18.1 T40 Torx (Star Drive), Deep Recess - 51 12-15
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    Material & manufacturing Advantages

    Industrial clients need consistent quality, durability, and cost control. Sinsun’s black concrete screws stand out through strict material control, precision manufacturing, and a proprietary black oxide coating—all backed by measurable data and industry standards benchmarked against top competitors like EJOT, ITW Buildex, and Hilti.​
    • 01

      - Material Quality:

      C1022 carbon steel (tensile strength 850–1050 MPa) for general industrial use; 304 (A2–70) and 316 (A4–80) stainless steel for places where corrosion is common (like coastal regions and chemical plants). Each batch of materials is tested for material composition (MTC). All materials come from certified suppliers (Baoshan Iron & Steel, POSCO). Our carbon steel meets ASTM A108 standards, and our stainless steel meets ASTM A240 standards, just like our competitors around the world.

    • 02

      - Black Oxide Coating:

      Our unique high-temperature chemical conversion process makes sure that the coating is the same thickness (10–15μm) all over and sticks well to the screw surface. Our coating is not like regular black oxide coatings (4–8μm) that peel off easily. It reduces friction by 22% during installation, tool wear by 30%, and corrosion resistance by 2.5 times compared to standard zinc plating. The coating is safe to use, meets RoHS and REACH standards, and can be used in food processing, medical facilities, and industrial cleanrooms. It also meets the same standards as EJOT and Hilti.

    • 03

      - Precision Production:

      55+ automatic production lines (from Germany and Japan) and 18 precision testing machines that can measure length and diameter to within ±0.05mm and ±0.1mm, which is the same level of precision as EJOT and Hilti. All of our products are tested for torque, tensile, and shear strength before packaging. We don't use random sampling like some of our competitors do, who only test 5–10% of their products.

    • 04

      - Quality Control System:

      ISO 9001:2015 certified, with a four-step inspection process: inspecting raw materials, checking the product while it's being made, inspecting the finished product, and checking packaging. The defect rate is kept below 0.02%, which is the same as international competitors (EJOT, Hilti) and 5 times lower than the industry average of 0.1%. It is also 25 times lower than low-cost domestic competitors (0.5-1.2%).

    FAQ: Black Concrete Screws​

    • 01

      Q: Are blue concrete screws stronger than black ones?

      A: Yes. The black coating doesn't make the screw weaker. Same steel, same thread shape, and same heat treatment.

    • 02

      Q:What's the difference between a black organic coating and a black oxide coating?

      A: Black oxide is a thin conversion coating (0.0001") that can be used inside. Black organic is a thicker polymer-based coating that works better for sheltered outdoor applications.

    • 03

      Q: Do black screws work in wood that has been treated with pressure?

      A: Yes. The black coating works with ACQ for occasional contact, but for direct embedding in treated wood, we suggest using stainless steel.

    • 04

      Q: Are there black screws with diameters of 3/8" and 1/2"?

      A: Yes. The lengths of our BLK-HD series range from 3/8" to 1/2" and up to 6".

    • 05

      Q: Which drill bit should I use for black concrete screws?

      A: The same as regular concrete screws: 5/32" for 3/16", 3/16" for 1/4", 3/8" for 3/8", and 1/2" for 1/2".

    • 06

      Q: Will the black coating last through installation?

      A: Our black organic coating is made to not get scratched while driving. The visible head stays coated.

    • 07

      Q: Can I use black screws outside?

      Yes, for outdoor use that is protected from direct rain (like under eaves). We suggest stainless steel for full exposure.

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