Technical Specifications

DIN 7504K / ISO 15480 Hex Washer Head Self Drilling Screws Surface Hardness ≥ 560 HV ; Core Hardness 320-400 HV Zinc Plated (Blue/White/Yellow), Ruspert, Dacromet, Magni
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DIN 7504K / ISO 15480 Hex Washer Head Self Drilling Screws Surface Hardness ≥ 560 HV ; Core Hardness 320-400 HV Zinc Plated (Blue/White/Yellow), Ruspert, Dacromet, Magni
DIN 7504K / ISO 15480 Hex Washer Head Self Drilling Screws Surface Hardness ≥ 560 HV ; Core Hardness 320-400 HV Zinc Plated (Blue/White/Yellow), Ruspert, Dacromet, Magni
DIN 7504K / ISO 15480 Hex Washer Head Self Drilling Screws Surface Hardness ≥ 560 HV ; Core Hardness 320-400 HV Zinc Plated (Blue/White/Yellow), Ruspert, Dacromet, Magni

Standard

DIN 7504K / ISO 15480

Specification

ST2.9 - ST6.3

Material

Case Hardened Steel / Stainless Steel (304/316) + Steel Tip (Bi-metal)

Property Class

Surface Hardness ≥ 560 HV ; Core Hardness 320-400 HV

Finish

Zinc Plated (Blue/White/Yellow), Ruspert, Dacromet, Magni

Product Description

Hex drive with integrated washer (flange). Drill point #1 to #5 available.

Industrial Applications

DIN 7504K Self-Drilling Screws with Hexagon Washer Head | Industrial Applications

1. Steel Structure & Roofing Systems

  • Metal Roof Panel Fastening:Recommended: ST4.8 * 25 / ST5.5 * 38 | Case Hardened Steel | Ruspert Coating (1000H Salt Spray)Technical Insight: Designed for fixing metal sheets to steel purlins without pre-drilling. The Ruspert coating offers superior acid rain resistance, essential for industrial roofing longevity.
  • Composite Sandwich Panel Installation:Recommended: ST5.5 * 75 / ST6.3 * 125 | Carbon Steel Grade 5 | Zinc Plated + EPDM WasherTechnical Insight: The integrated EPDM washer creates a watertight seal, preventing leakage and thermal bridging. The long drill point (Tek 5) can penetrate steel thicknesses up to 12mm in a single operation.

2. HVAC & Ductwork Systems

  • Ventilation Duct Assembly:Recommended: ST4.2 * 13 / ST4.8 * 19 | Stainless Steel A2 (SS304) | Bi-MetalTechnical Insight: Bi-metal construction (SS304 body with a carbon steel drill tip) combines the corrosion resistance of stainless steel with the drilling capacity needed for galvanized steel ducts, preventing "tea staining" in humid environments.
  • External AC Unit Brackets:Recommended: ST5.5 * 25 / ST5.5 * 32 | Grade 1022A Steel | Blue Zinc PlatedTechnical Insight: Provides a high-torque, vibration-resistant connection for outdoor equipment mounting. The hex head ensures no-slip driving with power tools on construction sites.

3. Solar Energy & Prefabricated Buildings

  • Solar Panel Rail Mounting (to Steel Beams):Recommended: ST6.3 * 25 / ST6.3 * 50 | Grade 10.9 Equivalent | Hot Dip Galvanized (HDG)Technical Insight: High-tensile self-drilling screws ensure the solar racking remains secure under extreme wind uplift. The hex washer head distributes the clamping force evenly across the aluminum rail.
  • Container House Chassis Assembly:Recommended: ST5.5 * 38 / ST6.3 * 45 | Case Hardened | Zinc PhosphatedTechnical Insight: Ideal for rapid assembly of light-gauge steel frames. Phosphating provides a stable surface for subsequent painting or coating of the modular unit.

4. Automotive & Transport Infrastructure

  • Truck Trailer Body Paneling:Recommended: ST4.8 * 16 / ST5.5 * 25 | Stainless Steel 410 (Hardenable) | PassivatedTechnical Insight: SS410 is magnetic and heat-treatable, allowing it to drill through tough steel frames while maintaining better corrosion resistance than carbon steel in transit environments.
  • Sound Barrier Wall Fixation:Recommended: ST6.3 * 32 / ST6.3 * 50 | Carbon Steel | Green/Grey GeometTechnical Insight: Geomet coating is chrome-free and hydrogen-embrittlement-free, making it the eco-friendly choice for public infrastructure projects requiring high durability and salt-spray resistance.