Flathead Self Tapping Screws

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304 stainless steel cross countersunk flat tail flat head self-drilling screw (flat head self-drilling screw) is a high-performance self-drilling fastener designed for efficient penetration of metal plates. Its unique drill tail tip combined with precision thread can achieve simultaneous drilling, tapping and locking on steel plates, aluminum plates, and composite plates, greatly improving installation efficiency by more than 50%. As a core component of modern engineering fastening, this type of screw reaches A2-70 strength grade through cold working hardening.

Product Features
Flat head self-drilling screws are made of 304 stainless steel, and are rust-free for 96 hours through copper salt accelerated acetate mist test. The service life can reach more than 10 years in a coastal high-salt environment or an industrial acid rain area. The material must pass three tests to ensure that it does not change color with a special test solution, followed by a spectrometer to verify the composition, and finally, a real environment smoke test.

Product Picture

 

Self-drilling and self-tapping integrated design

No pre-drilling required: directly penetrate 2.5mm galvanized sheet or 1.5mm stainless steel sheet, 60° precision thread angle ensures thread forming rate ≥95%

Chip removal optimization: spiral tail groove design reduces 30% penetration resistance and avoids thermal deformation of materials

Compared with traditional screws, installation efficiency is increased by 3 times.

High-strength mechanical locking

Through cold heading + solution treatment, key indicators far exceed GB standards;

Torque transmission: The cross slot Pozidriv system provides 40% higher torque transmission than ordinary cross slots

Tensile strength: M5 screws reach 1,320N

Vibration test: After 3 years of use, simulated by Q-FOG cyclic salt spray vibration table, the preload retention rate is ≥85%

Raw Material

Cold Forging

Threading

Auto Lathe

Auto Lathe

Table Lathe

CNC Lathe

Quality Checking

Inspection

Packing

Especially suitable for dynamic load scenarios such as fan housings and vibrating screens

Head functionality

Precision cone head design achieves:
Fully sunk: zero head protrusion in plates with a thickness of more than 1.2mm

Pressure distribution: The contact area of ​​the cone surface is 25% larger than that of ordinary countersunk heads, effectively preventing deformation of thin plates

Surface compatibility: Suitable for sprayed plates/wood grain transfer aluminum plates, and will not damage the decorative layer after installation

Customized service

Clipers Micrometer

Torque

Depth Micrometer

Plug

Thread Guage

Ring Guage

Hardness Tester

Projector

Salt Spray Testing

Material customization: 304H stainless steel is provided, suitable for indoor dry environments, and standard 304 stainless steel is also provided, which passes the 96-hour salt spray test. And the corrosion-resistant 316L stainless steel material can pass the 2000-hour salt spray test and is suitable for seawater environment.

Customized size: accept non-standard size orders.

Micro series: M1.7 countersunk self-tapping screws

Heavy series: M10 self-drilling screws

Special ratio: large head and small thread

48-hour proofing, support 3D drawings or physical sample reproduction

Surface treatment
Provide enhanced solutions based on the basic type: precision electrolytic polishing for medical equipment
Black passivation: meet the camouflage requirements of military equipment
Teflon coating: temperature resistance of 260℃, used for oven assembly

Why choose us?

Through product life cycle quality management, we ensure that every link from raw material procurement to finished product delivery meets the most stringent industrial standards, providing reliable fastening solutions for your critical equipment. We will continue to be committed to providing the most reliable fastening solutions to customers around the world. Whether you need self-tapping screws of standard specifications or face special application challenges, our engineering team can provide professional support.