DIN 7504K Hex Washer Flange Head Self Drilling Screws
DIN 7504-K specifies hexagon washer head drilling screws with tapping screw threads. The hexagonal head provides a secure drive for installation with a wrench or socket, while the integrated drill point allows the screw to drill through suitable metal substrates and form its own mating thread in a single operation. The washer head helps distribute the clamping force over a wider area.
We work with manufacturing facilities equipped with specialized cold heading and thread rolling machines to produce self-drilling screws with consistent dimensions and thread quality. Combined with controlled heat treatment and drilling performance checks, these processes help ensure reliable fastening performance.
Specification:
| Item | Specification |
|---|---|
| Standard | DIN 7504K |
| Product Type | Hex Washer Flange Head Self Drilling Screws |
| Thread Diameter | ST2.9-ST6.3 |
| Thread Standard | ISO 1478 |
| Material | Carbon Steel, Stainless Steel |
| Mechanical Property | ISO 10666 |
| Surface Treatment | Black Oxidation,Zinc Plated,Bright Finish |
| Inspection | Dimensions,Thread,Hardness,Coating |
Dimension Chart:
| Mon | ST2.9 | ST3.5 | ST3.9 | ST4.2 | ST4.8 | ST5.5 | ST6.3 |
| P | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| a max | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| h min | 0.4 | 0.6 | 0.6 | 0.8 | 0.9 | 1 | 1 |
| dc max | 6.3 | 8.3 | 8.3 | 8.8 | 10.5 | 11 | 13.5 |
| dc min | 5.8 | 7.6 | 7.6 | 8.1 | 9.8 | 10 | 12.2 |
| e min | 4.28 | 5.96 | 5.96 | 7.59 | 8.71 | 8.71 | 10.95 |
| k max | 2.8 | 3.4 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 |
| k min | 2.5 | 3 | 3 | 3.6 | 3.8 | 4.8 | 5.3 |
| r max | 0.4 | 0.5 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 |
| s max | 4 | 5.5 | 5.5 | 7 | 8 | 8 | 10 |
| s min | 3.82 | 5.32 | 5.32 | 6.78 | 7.78 | 7.78 | 9.78 |
| Drilling plate thickness min | 0.7 | 0.7 | 0.7 | 1.75 | 1.75 | 1.75 | 2 |
| Drilling plate thickness max | 1.9 | 2.25 | 2.4 | 3 | 4.4 | 5.25 | 6 |
| z max | 6.25 | 6.65 | 7.2 | 8.7 | 9.3 | 11 | 12 |
- Related Screws
- Self Drilling Screw
- DIN 7504O Cross Recessed Countersunk Drilling Screws
- DIN 7504N Cross Recessed Pan Head Drilling Screws
- DIN 7504M Cross Recessed Pan Head Drilling Screws
- Self Tapping Screw
- ASME B18.6.3 Cross Recessed Pan Head Self Tapping Screw
- ASME B18.6.3 Phillips Hex Collar Self Tapping Screws
- ASME B18.6.3 Slotted Hex Collar Self Tapping Screw
- ASME B18.6.3 Square Slot Pan Head Self Tapping Screw
- ASME B18.6.3 Cross Recessed Truss Head Tapping Screw
- ASME B18.6.3 Slotted Pan Head Self Tapping Screw
- ASME B18.6.3 Torx Flat Head Self Tapping Screw
- ASME B18.6.3 Phillips Oval Tapping Screw
- ASME B18.6.3 Slotted Countersunk Head Self Tapping Screw
Mechanical Property:
ISO 10666 – Mechanical Property
ISO 10666 specifies the mechanical and functional performance requirements for heat-treated steel self-drilling screws. It covers surface hardness, core hardness, case depth and torsional strength, as well as drilling and thread-forming capability. These requirements help verify that DIN 7504-K screws can drill through the specified metal substrates and form mating threads while maintaining sufficient strength during installation.