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Flat head self-drilling screw

Flat head self-drilling screw

Flat head self-drilling screws are engineered fasteners designed to drill, tap, and secure materials in a single operation. These screws feature a integrated drill point at the tip, which eliminates the requirement for pre-drilled pilot holes in metal substrates. The flat countersunk head is designed to sit flush with or below the surface of the material, providing a smooth finish that prevents snagging and allows for subsequent coating or layering. Manufactured typically from hardened carbon steel or stainless steel, these fasteners are optimized for high-torque applications where structural integrity and aesthetic concealment are primary requirements.
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  • Flat head self-drilling screw
  • Flat head self-drilling screw
  • Flat head self-drilling screw
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Countersunk Geometry
#2 to #5 Drill Points
DIN 7504P Compliant

Flat Head Self-Drilling Screws: Precision Fastening Solutions

TA1
Integrated Drilling Tip
The specialized point functions as a drill bit, cutting through steel sheets and sections without damaging the fastener threads.
TA2
Flush Surface Finish
The countersunk head geometry ensures the fastener does not protrude, maintaining the aerodynamic and physical profile of the assembly.
TA3
High Torque Transmission
Designed with drive recesses such as Phillips, Torx, or Square to minimize cam-out and ensure consistent installation speeds.
TA4
Material Efficiency
By combining three steps—drilling, tapping, and fastening—into one, these screws reduce labor time and tool wear on the job site.

Key Product Characteristics

Material Carbon Steel (SAE 1022), Stainless Steel (304, 316, 410)
Coating Options Zinc Plating, Yellow Zinc, Black Oxide, Ruspert, or Dacromet
Head Type Flat Countersunk (typically 80-100 degree angle)
Drill Point Type #2, #3, #4, or #5 (depending on metal thickness)
Thread Design Fine or Coarse threads according to DIN 7504P or ISO standards
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Primary Application Scenarios

M2M
Metal-to-Metal Fastening
Attaching thin-gauge steel plates to thicker structural steel frameworks.
CF
Cabinetry and Furniture
Securing metal brackets to wooden or composite surfaces where a flush finish is mandatory.
HVAC
HVAC Installation
Assembling ductwork and ventilation systems where internal protrusions must be minimized.
DWS
Drywall to Heavy Gauge Studs
Specialized versions are used to attach gypsum board or cement board to metal framing exceeding 0.9mm thickness.
maintenance note

Storage Conditions

To prevent surface oxidation, store fasteners in a dry, temperature-controlled environment. If the screws are coated with zinc or other sacrificial layers, keep them in their original moisture-resistant packaging until use to avoid exposure to high humidity or corrosive salt spray.
technical protocol

Installation Guidance

  • RPM Regulation: Use a power driver with adjustable speed. Excessive RPM can cause the drill point to overheat and lose its tempering, leading to failure.
  • Pressure Application: Apply constant, perpendicular pressure during the initial drilling phase to ensure the point bites into the metal effectively.
  • Depth Control: Use a depth-sensitive nosepiece to prevent over-driving, which can strip the internal threads formed in the substrate.
DIN 7504P
#2 - #5 Points
Countersunk 80-100°
SAE 1022 / 304-316

Related Products

Zhejiang Donghe Machinery Technology Co., Ltd.

 

Zhejiang Donghe Machinery Technology Co., Ltd. offer Wholesale Flat head self-drilling screw Manufacturers. Our company passed the ISO9001:2000 quality management certification system standard in 2017 and is an enterprise with self-operating import and export rights.
Our company produces various international industrial standard products, including Chinese GB standards, German DIN standards, American ANSI standards, British B standards, and so on. In addition, our company can customize various non-standard fasteners according to customer requirements. The products are exported to Europe, Australia, Africa, the United States, and other regions. We always provide customers with good product and technical support, and sound after-sales service.

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