The most reliable and legally sound method is to purchase the standard directly from official standardization bodies. These sources provide the most up-to-date, corrected, and copyrighted versions.
. These fasteners are designed to drill their own pilot hole, form a mating thread, and complete the fastening in a single operation, eliminating the need for pre-drilling in metal substrates Bugel Алматы Core Technical Specifications According to the DIN 7504 Standard , the "K" designation specifically refers to the Hexagon Head with Washer/Collar Specification Details Common Diameters ST3.5, ST3.9, ST4.2, ST4.8, ST5.5, ST6.3 Dega Demir ve Galvaniz Sanayi A.Ş. Head Style External hexagon with a fixed flange (collar)
Unfortunately, I don't have direct access to copyrighted materials, including standards. However, I can provide some general information and guidance on the standard.
: Typically case-hardened steel (often zinc-plated) or stainless steel (A2/A4 grades). din 7504 k standard pdf
Measures the thickness of the hex head, including the collar.
Major industrial suppliers, such as Bossard or Transhow , provide technical data sheets based on these standards.
Effective for attaching plastics, wood, or other materials onto metallic substrates. Advantages of Using DIN 7504 K Fasteners The most reliable and legally sound method is
HV) with electroplated coatings are susceptible to this, which should be considered in high-load applications. Common Applications and Use Cases
The following specifications are commonly found in technical data sheets for DIN 7504 K: : Hexagon head with an integrated washer/flange.
Minimum 560 HV to successfully cut through structural steel profiles. 2. Stainless Steel (Bi-Metal) These fasteners are designed to drill their own
: These screws typically feature a "drill point" tip capable of piercing sheet metal or heavy profiles up to several millimetres thick without prep. Technical Specifications & Dimensions According to manufacturers like INDEX A Perfect Fixing Aspen Fasteners , the standard covers a specific range of metric sizes: Nominal Diameter ( Head Thickness ( Spanner Size ( Max Drilling Capacity Data compiled from CELO Fixings Materials and Coatings
The choice of material and surface finish is vital for ensuring fastener longevity, especially in demanding environments.
The table below provides the key dimensions as specified in the withdrawn DIN 7504:1995-09 standard for Type K screws:
Many reputable fastener manufacturers also provide abbreviated technical data sheets derived directly from the DIN 7504 K PDF for engineering reference during the procurement process.
It's helpful to know the other types to avoid confusion when sourcing parts.