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A Countersunk Bolt, often called a flat head bolt, is a highly versatile embedded fastener. It is designed for applications requiring a perfectly flat surface. These specialized fasteners feature a tapered head and a fully threaded shank. They are ideal for installations where zero protrusion is critical. Manufactured to ASME, DIN, GB, and BS standards, our products boast precise dimensional tolerances and exceptional interchangeability. The primary advantage is their ability to completely recess into a workpiece. Once installed, they leave a smooth finish. This prevents obstruction, avoids interference with moving parts, and maintains equipment aesthetics.
To meet the rigorous demands of industrial assembly, our countersunk bolts utilize advanced manufacturing techniques. Precise geometry and robust construction ensure reliable performance across diverse fastening scenarios.
We utilize a standard 90-degree conical head design. The bevel precisely fits the installation hole, ensuring the fastener is completely recessed. This embedded structure guarantees zero protrusion. It creates a flat surface that avoids bumps, scratches, and interference issues.
Employing an advanced cold-forging process, each bolt is seamlessly molded. This method eliminates splices, breaks, or loose holes. It provides uniform strength and stable toughness for a durable connection. As a result, the fastener resists breakage under stress, delivering high structural precision.
The screw shank is machined using a high-precision thread rolling process. This results in a uniform pitch and a full thread profile. Free from burrs or misaligned threads, the screw engages smoothly. This ensures precise locking and minimizes the risk of stripping.
The internal groove structure is fully compatible with mainstream drive methods. Options include Phillips and hexagonal socket configurations. When used with standard assembly tools, the driving force remains highly concentrated. This design prevents slippage and rounding during high-volume batch installations.
Our product range offers extreme versatility. We cover coarse thread, fine thread, extended, and standard sizes. Whether your assembly involves thin plates or heavy-duty components, we have the right solution. Standard sizes are readily available, and we support custom processing.
What sets DECOPPER Metal apart is our unparalleled expertise in high-quality copper and bronze alloys. We manufacture our countersunk bolts using premium materials like Silicon Bronze, Phosphor Bronze, Tin Bronze, and Aluminium Bronze. These specialized alloys provide superior corrosion resistance and exceptional anti-galling properties. They are the ideal choice for harsh industrial environments. For instance, our Silicon Bronze Countersunk Bolts easily withstand saltwater exposure and extreme weather conditions without degrading.
To assist B2B buyers and engineers, we maintain strict adherence to international manufacturing standards. Our flat head fasteners comply fully with ASME, DIN, GB, and BS specifications. This ensures global interchangeability and precise dimensional tolerances. Below is a general overview of our standard options:
| Specification Parameter | Details & Options |
| Head Style | 90-Degree Conical Countersunk (Flat Head) |
| Drive Types | Phillips, Hexagonal Socket, Slotted |
| Thread Types | Coarse Thread, Fine Thread, Fully Threaded |
| Material Options | Silicon Bronze, Phosphor Bronze, Tin Bronze, Aluminium Bronze, White Copper |
| Manufacturing Standards | ASME, DIN, GB, BS |
| Customization | Non-standard sizes, extended lengths, and special alloys available upon request |
After installation, the head is completely recessed, resulting in a smooth surface that does not protrude from the workpiece surface. This effectively avoids friction, jamming, wear, and structural interference problems that occur during equipment operation, plate sliding, and workpiece movement. It is particularly suitable for moving parts, sliding tables, and precision moving mechanisms.
The tapered bevel can fit a large area against the countersunk hole of the workpiece, distributing force evenly. After locking, the fit is tight and secure, preventing one-sided lifting, force shifting, or loosening. It maintains a stable locking state even under prolonged equipment vibration, ensuring high positioning accuracy.
The embedded installation method ensures a smooth and flat surface for the entire workpiece. The assembled product is neat and aesthetically pleasing, with no exposed bolt protrusions. It is ideal for fastening equipment shells, decorative panels, exterior components, and external parts of precision instruments.
Compared to protruding bolts, countersunk bolts do not occupy external space, making them suitable for compact equipment, thin plates, enclosed structures, and close-proximity assembly conditions, effectively improving the overall compactness and structural integrity of the equipment.
All models are of standard specifications with strong interchangeability, compatible with common nuts and bolt holes on the market, making procurement convenient and replacement simple; mature mass production technology ensures stable quality, low batch assembly costs, and a balance between precision, practicality, and economy.
Thanks to their embedded locking and tight fit, these fasteners are indispensable across multiple heavy industries. They are widely applied in scenarios requiring perfectly flat surfaces. Common uses include precision equipment assembly, external component mounting, and sheet metal splicing.
Shipbuilding & Marine: Ideal for hull assembly and deck fittings where corrosion resistance is paramount.
Machinery & Equipment: Used in moving mechanisms to prevent interference between sliding parts.
Petroleum & Chemical: Provides secure, anti-galling fastening in highly corrosive processing environments.
Metallurgy & Steel: Delivers robust holding power for heavy-duty structural components.
As a specialized division of DETONG METAL, DECOPPER Metal is a leading manufacturer of high-quality copper products. With over 20 years of experience, our 5000m² workshop features advanced production equipment. We achieve a monthly output exceeding 12,500,000 sets. We implement a strict quality management system with dedicated QC inspectors for every order. Having successfully supplied over 500 worldwide projects, we are a trusted countersunk bolt supplier. We also fully support third-party independent inspections. To discuss your specific project requirements, please contact our engineering team for a detailed quote.
We understand that selecting the right embedded fasteners requires careful consideration. Below are answers to common questions we receive from our industrial clients.
Our standard flat head fasteners feature a 90-degree conical design. This ensures a precise fit into the installation hole. It creates a perfectly flat, zero-protrusion surface, eliminating interference with moving parts.
Yes, DECOPPER Metal specializes in custom processing. We can manufacture non-standard sizes, extended threads, and specific head dimensions. Our team will work closely with you to meet your exact project requirements.
Silicon Bronze and Phosphor Bronze are highly recommended for marine environments. These premium copper alloys offer exceptional corrosion resistance against saltwater. They ensure long-lasting performance in harsh conditions.
Absolutely. All our fasteners are manufactured strictly according to ASME, DIN, GB, and BS standards. This ensures high precision, standard thread profiles, and global interchangeability for seamless integration.
