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DIN7504 Self Drilling Screws
Name | DIN7504 self drilling screws |
Standard | DIN7504 |
Size Range | St2.9-6.3 |
Finish | Bright&Clean |
Marking | No Marking |
Material | SS304,A2,1.4301; SS316,A4,1.4401 |
Grade | Grade A2-70 & A4-70 |
Certificates | EN10204-3.1B |
Non-standards | OEM is available, according to drawing or samples |
Samples | Samples available |
Package | Bulk in box and then in cartons, then on pallets,or according to customers' requirement. |
Payment | T/T,Western Union， if order more than USD50,000 L/C is accepted |
Similar Grades of 304 Stainless Steel
| Grade | UNS | W.Nr |
| 304 | S30400 | 1.4301 |
Chemical Composition of 304 Stainless Steel
| Alloy | % | Ni | Cr | C | Mn | Si | S | N | P |
| 304 | Min. | 8 | 18 | ||||||
| Max. | 10.5 | 20 | 0.08 | 2.0 | 1.0 | 0.03 | 0.10 | 0.035 |
Physical properties of 304 stainless steel
| Density | 7.93 g/cm³ |
| Melting point | 1398-1454°C |
Minimum mechanical properties of 304 stainless steel alloy at room temperature
| Tensile strength Rm N/mm² | Yield strength RP0.2 N/mm² | Elongation rate A5% | Brinell hardness HB |
| 520 | 205 | 40 | ≤187 |
Similar Grades of 316 Stainless Steel
| Grade | UNS | W.Nr |
| 316 | S31600 | 1.4401 |
Chemical composition of 316 stainless steel round rod
| Alloy | % | Ni | Cr | C | Mn | Si | S | N | P |
| 316 | Min. | 10.0 | 16.0 | 2.0 | |||||
| Max. | 14.0 | 18.0 | 0.08 | 2.0 | 1.0 | 0.03 | 3.0 | 0.045 |
Minimum mechanical properties of 316 stainless steel round bar alloy at room temperature
| Density | 7.98g/cm³ |
| Melting point | 1345-1450°C |
Minimum mechanical properties of 316 stainless steel round bar alloy at room temperature
| Tensile strength Rm N/mm² | Yield strength RP0.2 N/mm² | Elongation rate A5% | Brinell hardness HB |
| 520 | 205 | 40 | ≤187 |
These screws feature a self-tapping drill tip that eliminates the need for pre-drilling, making them ideal for on-site construction, roofing, and sheet metal fabrication. The sharp drill point and fluted shank ensure clean, burr-free holes in steel up to 3mm thick, while the hexagonal washer head provides uniform load distribution and 防松 (anti-loosening) performance. Available in zinc-plated carbon steel and stainless steel variants, they balance affordability with corrosion resistance for diverse applications.
1. DIN7504 Compliance: Meets the dimensional and performance requirements of DIN 7504-1, including drill tip geometry (118° point angle), thread pitch (1.6mm for M6-M12), and minimum drill-through capacity (3mm steel + 0.5mm sealing washer).
2. Self-Drilling Efficiency: The patented drill tip with a 引导倒角 (guide chamfer) reduces insertion torque by 30% compared to generic self-tapping screws, allowing installation speeds up to 200 RPM with standard cordless drills.
3. Corrosion Protection: Zinc-plated (8μm, passivated) carbon steel screws offer 500+ hours of salt spray resistance (ASTM B117), while A2-70 stainless steel versions (ISO 3506-1) are suitable for coastal or high-humidity environments, with a corrosion rate <0.1mm/year.
4. Hex Washer Head Design: The integrated washer (diameter: 1.5x thread diameter) distributes clamping force evenly, preventing sheet metal deformation, while the 6-lobe drive (compatible with Torx T30 or hex socket bits) reduces cam-out during high-torque applications.
5. Thread Engagement: The deep-cut, double-lead thread (pitch 1.6mm) provides 20% more thread contact than single-lead screws, ensuring secure fastening in soft metals like aluminum and galvanized steel.
• Metal Roofing and Cladding: Secures steel or aluminum roofing sheets to purlins, with optional EPDM washer (included) for watertight seals in gutters and flashings.
• Industrial Shelving and Racking: Used in modular storage systems, where quick installation and load-bearing capacity (up to 5kN for M8 screws) are essential for warehouse efficiency.
• Automotive Body Panels: Installs lightweight aluminum or high-strength steel panels in vehicle manufacturing, reducing assembly time and tooling costs.
• HVAC Ductwork: Fastens galvanized steel ducts and fittings in heating/cooling systems, resisting vibration and thermal expansion with its anti-loosening thread design.
Q: Can these screws be used in hardwood or concrete?
A: No, they are optimized for metal sheets (1-3mm thickness). For wood, use our DIN7505 self-tapping screws; for concrete, consider masonry anchors.
Q: What is the maximum sheet metal thickness these screws can penetrate?
A: Designed for steel up to 3mm and aluminum up to 4mm. For thicker materials, pre-drill a pilot hole (diameter: 0.8x screw shank diameter).
Q: Are the zinc-plated screws suitable for outdoor use?
A: Yes, the passivated zinc coating meets EN ISO 10683 Class C2-C3 for outdoor exposure. For severe marine environments, choose stainless steel or hot-dip galvanized (ISO 1461) versions.
Q: Do the screws come with sealing washers?
A: Standard packs include EPDM washers (black, 6mm thickness) for weatherproof applications. Non-sealing versions are available for indoor use at a 15% cost reduction.
Q: What drive bit is recommended to prevent stripping?
A: Use a Torx T30 bit with a magnetic tip to ensure proper engagement. Over-tightening (beyond 8N·m for M6) may damage the drive recess.
DIN7504 Self Drilling Screws
Name | DIN7504 self drilling screws |
Standard | DIN7504 |
Size Range | St2.9-6.3 |
Finish | Bright&Clean |
Marking | No Marking |
Material | SS304,A2,1.4301; SS316,A4,1.4401 |
Grade | Grade A2-70 & A4-70 |
Certificates | EN10204-3.1B |
Non-standards | OEM is available, according to drawing or samples |
Samples | Samples available |
Package | Bulk in box and then in cartons, then on pallets,or according to customers' requirement. |
Payment | T/T,Western Union， if order more than USD50,000 L/C is accepted |
Similar Grades of 304 Stainless Steel
| Grade | UNS | W.Nr |
| 304 | S30400 | 1.4301 |
Chemical Composition of 304 Stainless Steel
| Alloy | % | Ni | Cr | C | Mn | Si | S | N | P |
| 304 | Min. | 8 | 18 | ||||||
| Max. | 10.5 | 20 | 0.08 | 2.0 | 1.0 | 0.03 | 0.10 | 0.035 |
Physical properties of 304 stainless steel
| Density | 7.93 g/cm³ |
| Melting point | 1398-1454°C |
Minimum mechanical properties of 304 stainless steel alloy at room temperature
| Tensile strength Rm N/mm² | Yield strength RP0.2 N/mm² | Elongation rate A5% | Brinell hardness HB |
| 520 | 205 | 40 | ≤187 |
Similar Grades of 316 Stainless Steel
| Grade | UNS | W.Nr |
| 316 | S31600 | 1.4401 |
Chemical composition of 316 stainless steel round rod
| Alloy | % | Ni | Cr | C | Mn | Si | S | N | P |
| 316 | Min. | 10.0 | 16.0 | 2.0 | |||||
| Max. | 14.0 | 18.0 | 0.08 | 2.0 | 1.0 | 0.03 | 3.0 | 0.045 |
Minimum mechanical properties of 316 stainless steel round bar alloy at room temperature
| Density | 7.98g/cm³ |
| Melting point | 1345-1450°C |
Minimum mechanical properties of 316 stainless steel round bar alloy at room temperature
| Tensile strength Rm N/mm² | Yield strength RP0.2 N/mm² | Elongation rate A5% | Brinell hardness HB |
| 520 | 205 | 40 | ≤187 |
These screws feature a self-tapping drill tip that eliminates the need for pre-drilling, making them ideal for on-site construction, roofing, and sheet metal fabrication. The sharp drill point and fluted shank ensure clean, burr-free holes in steel up to 3mm thick, while the hexagonal washer head provides uniform load distribution and 防松 (anti-loosening) performance. Available in zinc-plated carbon steel and stainless steel variants, they balance affordability with corrosion resistance for diverse applications.
1. DIN7504 Compliance: Meets the dimensional and performance requirements of DIN 7504-1, including drill tip geometry (118° point angle), thread pitch (1.6mm for M6-M12), and minimum drill-through capacity (3mm steel + 0.5mm sealing washer).
2. Self-Drilling Efficiency: The patented drill tip with a 引导倒角 (guide chamfer) reduces insertion torque by 30% compared to generic self-tapping screws, allowing installation speeds up to 200 RPM with standard cordless drills.
3. Corrosion Protection: Zinc-plated (8μm, passivated) carbon steel screws offer 500+ hours of salt spray resistance (ASTM B117), while A2-70 stainless steel versions (ISO 3506-1) are suitable for coastal or high-humidity environments, with a corrosion rate <0.1mm/year.
4. Hex Washer Head Design: The integrated washer (diameter: 1.5x thread diameter) distributes clamping force evenly, preventing sheet metal deformation, while the 6-lobe drive (compatible with Torx T30 or hex socket bits) reduces cam-out during high-torque applications.
5. Thread Engagement: The deep-cut, double-lead thread (pitch 1.6mm) provides 20% more thread contact than single-lead screws, ensuring secure fastening in soft metals like aluminum and galvanized steel.
• Metal Roofing and Cladding: Secures steel or aluminum roofing sheets to purlins, with optional EPDM washer (included) for watertight seals in gutters and flashings.
• Industrial Shelving and Racking: Used in modular storage systems, where quick installation and load-bearing capacity (up to 5kN for M8 screws) are essential for warehouse efficiency.
• Automotive Body Panels: Installs lightweight aluminum or high-strength steel panels in vehicle manufacturing, reducing assembly time and tooling costs.
• HVAC Ductwork: Fastens galvanized steel ducts and fittings in heating/cooling systems, resisting vibration and thermal expansion with its anti-loosening thread design.
Q: Can these screws be used in hardwood or concrete?
A: No, they are optimized for metal sheets (1-3mm thickness). For wood, use our DIN7505 self-tapping screws; for concrete, consider masonry anchors.
Q: What is the maximum sheet metal thickness these screws can penetrate?
A: Designed for steel up to 3mm and aluminum up to 4mm. For thicker materials, pre-drill a pilot hole (diameter: 0.8x screw shank diameter).
Q: Are the zinc-plated screws suitable for outdoor use?
A: Yes, the passivated zinc coating meets EN ISO 10683 Class C2-C3 for outdoor exposure. For severe marine environments, choose stainless steel or hot-dip galvanized (ISO 1461) versions.
Q: Do the screws come with sealing washers?
A: Standard packs include EPDM washers (black, 6mm thickness) for weatherproof applications. Non-sealing versions are available for indoor use at a 15% cost reduction.
Q: What drive bit is recommended to prevent stripping?
A: Use a Torx T30 bit with a magnetic tip to ensure proper engagement. Over-tightening (beyond 8N·m for M6) may damage the drive recess.
