DIN7983 Cross Recessed Raised Countersunk Head Tapping Screws
DIN 7983 Cross Recessed Raised Countersunk Head Tapping Screws are designed for assemblies where the fastener head needs to sit neatly within or close to the surface of the component. The raised countersunk head combines a tapered underside with a slightly projecting head, allowing the screw to provide a clean fastening appearance while retaining a defined bearing area around the joint. Its cross recess provides a familiar drive interface for screwdrivers and powered installation tools.
The tapping thread allows the screw to engage directly with a suitable pre-drilled hole, eliminating the need for a separate nut in many sheet-metal and fabricated-component assemblies. The combination of a raised countersunk head, cross recess, and tapping thread makes DIN 7983 useful when both the appearance of the finished surface and practical production assembly matter. Screw diameter, length, material, and surface finish can be selected according to the thickness of the components, substrate characteristics, installation requirements, and service environment.
Specification:
DIN 7983 tapping screws are specified by their raised countersunk head, cross recess, tapping thread, and pointed shank. The raised countersunk configuration provides a defined seating surface when the screw is installed into a prepared countersunk hole, while the cross recess allows straightforward tightening with commonly used screwdrivers or powered assembly tools. The thread and point geometry are designed for direct engagement with suitable metal or other compatible substrates.
For different production and service requirements, DIN 7983 screws can be supplied in carbon steel or stainless steel. Carbon steel versions are commonly selected for general sheet-metal fabrication and mechanical assemblies, with zinc plating, zinc flake, black oxide, or other finishes available for corrosion protection. Stainless steel versions can be selected where moisture resistance is more important, including equipment housings and outdoor or corrosive-service assemblies. Screw diameter, length, head dimensions, thread configuration, material grade, and surface finish can be specified according to the applicable standard and customer requirements.
| Item | Specifiacation |
|---|---|
| Product Type | Raised Countersunk Head Tapping Screw |
| Head Type | Raised Countersunk Head |
| Drive | Cross Recess/Phillips |
| Thread Type | Tapping Thread |
| Thread Diameter | ST2.2-ST6.3 |
| Material | Carbon Steel/Stainless Steel |
| Surface Treatment | Zinc Plated/Dacromet/Black Oxidation/Bright Finish/Passivation |
| Installation | Screwdrive |
Dimension Chart of DIN7983 Tapping Screws:
The DIN 7983 dimension chart covers the main dimensions used to select a raised countersunk head tapping screw for a particular joint. The available tapping screw sizes range from ST2.2 to ST6.3, providing options for thin sheet-metal components as well as larger fabricated parts. Screw diameter and length should be selected according to the material thickness and the required thread engagement, while the head dimensions determine how the screw seats against the countersunk surface.
Key dimensions include the nominal thread diameter (ST), screw length (l), raised countersunk head diameter (dk), head height (k), and cross-recess dimensions. The countersunk head geometry is particularly important when the finished surface needs controlled head projection, so the mating hole should be prepared to suit the specified head dimensions. Comparing the diameter, length, and head geometry in the chart helps ensure proper seating, sufficient thread engagement, and compatibility with the selected installation tool.
| 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 | 11.97 |
| dk min | 4 | 5.2 | 6.44 | 7.14 | 7.74 | 9.14 | 10.37 | 2 |
| f | 0.7 | 0.9 | 1.2 | 1.3 | 1.4 | 1.5 | 1.7 | 3.8 |
| k | 1.3 | 1.7 | 2.1 | 2.3 | 2.5 | 3 | 3.4 | 3 |
| No. | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3.46 |
| M | 2.8 | 3.4 | 4.6 | 4.7 | 4.9 | 5.4 | 7 | 7.4 |
| t min | 1.17 | 1.81 | 1.89 | 2.04 | 2.24 | 2.7 | 3.02 | 4.35 |
| t max | 1.57 | 2.21 | 2.39 | 2.54 | 2.74 | 3.2 | 3.53 | 3.96 |
- RELATED SCREWS LISTS:
- Stainless Steel DIN7976 Hexagon Head Tapping Screws
- Stainless Steel DIN7982 Cross Recessed Countersunk Head Tapping Screws
- Stainless Steel DIN7985 Cross Recessed Raised Cheese Head Screws
- DIN7964E Stainless Steel Socket Head Cap Captive Screw
- Stainless Steel DIN964 Slotted Raised Countersunk Head Screws
- Stainless Steel DIN966 Cross Recessed Raised Countersunk Head Screws
- Stainless Steel DIN967 Cross Recessed Pan Head Screws with Collar
- Stainless Steel DIN968 Cross Recessed Pan Head Tapping Screws with Collar
- GB830 Stainless Steel Slotted Cheese Head Screws with Shoulder
- Stainless Steel GB831 Slotted Shoulder Screws
- Stainless Steel GB834 Knurled Thumb Screws
- Stainless Steel GB835 Knurled Screws
- Stainless Steel GB836Knurled Screws with Small Head
- Stainless Steel GB837 Slotted Pan Head Screws with Waisted Shank
- Stainless Steel GB839 Knurled Thumb Captive Screws with Waisted Shank
- Nickel Plated Smooth Shank Single Shoulder Shelf Support Screw
- Nickel Plated Furniture Shelf Peg with Matching Knurled Nut
Application of DIN7983 Tapping Screws:
DIN 7983 Tapping Screws are commonly selected for assemblies where two metal components need to be joined directly and the finished fastening point should remain relatively unobtrusive. The raised countersunk head is useful on parts such as cover plates, trim panels, access covers, mounting plates, nameplates, protective shields, and formed sheet-metal components. Instead of adding a separate nut, the tapping screw engages directly with a prepared hole, which can simplify the construction of assemblies made from overlapping metal parts.
For thin sheet and formed components, smaller sizes such as ST2.2 and ST2.9 can be used to secure lightweight covers, brackets, clips, instrument plates, and small retaining parts. ST3.5 and ST4.2 are suitable for general panel-to-panel connections, metal channels, cable-support components, furniture hardware, and fabricated brackets. Larger sizes such as ST5.5 and ST6.3 can be considered for thicker sheet, steel profiles, mounting rails, access panels, and structural metalwork where greater thread engagement is available.
The choice of material can also follow the environment of the finished product. Zinc-plated carbon steel screws are suitable for general fabricated-steel products, storage systems, metal shelving, workshop fixtures, and indoor assemblies. Stainless steel DIN 7983 screws can be selected for outdoor signage, commercial kitchen fittings, refrigeration components, wash-down areas, and other products regularly exposed to moisture. Where the joint is assembled on a production line, the cross recess allows straightforward use with electric or pneumatic screwdrivers, making the design suitable for repetitive fastening of panels and formed metal parts.