Faster Installation
Drills, taps, and fastens in one step, eliminating the need for pre-drilling and improving assembly efficiency.
DIN 7504O
Cross Recessed Countersunk Head Drilling Screws With Tapping Screw Thread
- Standard: DIN 7504O- 1995(Type H)
- Material: SUS304, SUS316, SUS410, Carbon Steel
- Size: ST2.9 – ST6.3
- Surface Treatment: Plain, Zinc Plated, HDG, Dacromet, Ruspert
- Thread Type: Tapping Screw Thread
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 Days
Product Overview
Product Application
DIN 7504 O (often equivalent to ISO 15482) specifies the technical requirements, dimensions, and characteristics for countersunk (flat) head self-drilling screws with a cross recess (typically Phillips drive, though sometimes pozi or torx variants exist).
Because it is a self-drilling screw, it features a drill-bit point that eliminates the need for a pre-drilled pilot hole when fastening sheet metal or plastic profiles to metal framing
Draw
Specification
Key Technical Specifications
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Head Style: Countersunk / Flat Head ($90^\circ$ countersink angle).
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Drive Type: Cross Recess (Type H / Phillips is standard; Type Z / Pozidriv or Hexalobular / Torx are also available under updated ISO standards).
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Point Type: Drilling point (capable of piercing and tapping its own threads in a single operation).
Application & Installation Tips
- Flush Finishes: The countersunk head profile ensures the screw sits completely flush with or just below the surface of the material, making it ideal for window manufacturing (PVC/Aluminum profiles), cladding, and cabinetry.
- Drilling Speed (RPM): High-speed installation is required for efficient chip evacuation. For stainless/bimetal variations, a lower RPM at higher pressure is recommended to avoid work-hardening of the metal substrate.
- Torque Control: Proper torque clutches should be used on drivers to prevent stripping the freshly formed internal threads, especially when drilling into thinner sheet metals.
Product Advantages
Flush & Clean Finish
The countersunk head sits flush with the surface, delivering a smooth appearance and reducing snagging risks.
Strong & Reliable Hold
Provides secure thread engagement with excellent vibration resistance, ideal for sheet metal, aluminum profiles, and light-gauge steel applications.
Common Questions
Does DIN 7504O require a pilot hole?
No. The drill-point tip is designed to drill and tap simultaneously in thin steel sections.
What is the difference between DIN 7504O and DIN 7504N?
DIN 7504O uses a countersunk head for flush mounting, while DIN 7504N uses a pan head that remains above the material surface.
Can DIN 7504O be used outdoors?
For outdoor or corrosive environments, 304 or 316 stainless steel versions are recommended.
What materials can DIN 7504O fasten?
It is primarily designed for sheet metal, thin steel sections, and metal profiles.
