DIN7972 Slotted Countersunk Head Tapping Screws
DIN 7972 slotted countersunk head tapping screws feature a flat countersunk head and a straight slot drive. The countersunk head is designed to sit flush with the surface when installed in a suitably countersunk hole, making these screws suitable for assemblies where a smooth surface finish is required. The slotted drive provides a simple installation method, while the self-tapping thread allows the screw to form mating threads in suitable materials.
We supply DIN 7972 slotted countersunk head tapping screws in various sizes, with carbon steel and stainless steel options available. Different surface finishes, including zinc plating and other protective coatings, can be selected according to application requirements. When choosing the appropriate screw, thread diameter, length, head dimensions, material grade, and corrosion resistance should be considered to ensure compatibility with the intended assembly.
Specification:
| Item | Specification |
|---|---|
| Standard | DIN7972 |
| Product Type | Slotted Countersunk Head Tapping Screws |
| Head Style | Countersunk Head |
| Drive Type | Slotted |
| Thread System | Metric |
| Thread Series | Self Tapping Thread |
| Thread Standard | ISO 1478 |
| Size Range | ST2.2-ST6.3 |
| Material | Carbon Steel,Stainless Steel |
| Surface Treatment | Black Oxidation,Zinc Plated,Bright Finish |
| Inspection | Dimensions,Thread,Hardness,Coating |
- RELATED SCREW LISTS:
- Self Tapping Screw
- DIN7971 Tapping Screws
- DIN7973 Slotted Tapping Screw
- DIN7976 Hex Head Self Tapping Screws
- DIN 968 Pan Head Self Tapping Screws with Collar
- DIN7982 Cross Recessed Self Tapping Screws
- DIN 7983 Raised Countersunk Tapping Screws
- ISO 14585 Torx Pan Head Self Tapping Screws
- DIN6928 Hexagon Washer Head Tapping Screws
- DIN7981 Cross Recessed Pan Head Tapping Screws
Dimension Chart:
| Mon | ST2.2 | ST2.9 | ST3.5 | ST3.9 | ST4.2 | ST4.8 | ST5.5 | ST6.3 |
| P | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| a max | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| dk max | 4.3 | 5.5 | 6.8 | 7.5 | 8.1 | 9.5 | 10.8 | 12.4 |
| dk min | 4 | 5.2 | 6.44 | 7.14 | 7.74 | 9.14 | 10.37 | 11.97 |
| k | 1.3 | 1.7 | 2.1 | 2.3 | 2.5 | 3 | 3.4 | 3.8 |
| n min | 0.66 | 0.86 | 1.06 | 1.06 | 1.26 | 1.26 | 1.66 | 1.66 |
| n max | 0.8 | 1 | 1.2 | 1.2 | 1.51 | 1.51 | 1.91 | 1.91 |
| t min | 0.4 | 0.5 | 0.6 | 0.7 | 0.75 | 0.85 | 1 | 1.2 |
| t max | 0.6 | 0.75 | 0.95 | 1.05 | 1.15 | 1.35 | 1.5 | 1.75 |
Mechanical Property:
ISO 2702 – Mechanical Properties of Steel Tapping Screws
DIN 7972 steel tapping screws must withstand the torsional stress generated during installation while maintaining the integrity of their threads. Core hardness, surface hardness, and minimum torsional strength are important factors in evaluating their performance. These properties help ensure that the screws can form threads in suitable materials without premature twisting failure or damage to the screw threads. ISO 2702 specifies the applicable mechanical requirements for heat-treated steel tapping screws.
ISO 3506-4 – Mechanical Properties of Stainless Steel Tapping Screws
For stainless steel DIN 7972 tapping screws, mechanical performance depends on the stainless steel grade and its material condition. Torsional strength is particularly important because the screw must withstand the torque applied during thread forming and installation. Hardness and thread-forming performance are also relevant when assessing suitability for different base materials. ISO 3506-4 defines the applicable mechanical and physical requirements for corrosion-resistant stainless steel tapping screws.