DIN 7973 Slotted Raised Countersunk Self-Tapping Screws (Type AB)
We supply DIN 7973 slotted raised countersunk self-tapping screws with the Type AB spaced thread and sharp point, in steel zinc plated and A2 and A4 stainless steel, from gauge 4 (2.9mm) to gauge 14 (6.3mm). The raised (oval) countersunk head with a straight slot suits visible fixings where a traditional decorative finish is wanted.
Also known as: slotted raised csk self tapper, slotted raised countersunk self tapping screw, slotted oval head sheet metal screw, din7973, DIN 7973 C.
DIN 7973 Type AB dimensions
| Diameter/Gauge | Thread pitch | Head diameter | Depth of csk | Height of dome | Slot width |
|---|---|---|---|---|---|
| 2.9mm/4g | 1.1mm | 5.5mm | 1.7mm | 0.9mm | 0.8mm |
| 3.5mm/6g | 1.3mm | 6.8mm | 2.1mm | 1.2mm | 1.0mm |
| 3.9mm/7g | 1.4mm | 7.5mm | 2.3mm | 1.3mm | 1.0mm |
| 4.2mm/8g | 1.4mm | 8.1mm | 2.5mm | 1.4mm | 1.2mm |
| 4.8mm/10g | 1.6mm | 9.5mm | 3.0mm | 1.5mm | 1.6mm |
| 5.5mm/12g | 1.8mm | 10.8mm | 3.4mm | 1.7mm | 1.6mm |
| 6.3mm/14g | 1.8mm | 12.4mm | 3.8mm | 2.0mm | 1.6mm |
Materials & strength
Raised countersunk head
Countersunk seating with a shallow domed top for a neat visible finish.
Slotted drive
Traditional straight slot - driven with a flat blade, and often specified for period or restoration work.
Type AB thread and point
Spaced self-tapping thread with a sharp point that forms its own thread in sheet metal, plastics and pre-punched holes.
Material options
Steel zinc plated for general indoor use; A2 stainless for corrosion resistance and A4 for marine and chloride environments.
Related specificationsWhat is the pozi equivalent of DIN 7973?
DIN 7983 is the same raised countersunk Type AB self-tapper with a pozi recess in place of the slot.
How does DIN 7973 differ from DIN 7972?
Both are slotted countersunk self-tappers; DIN 7973 adds a shallow dome (0.9mm to 2.0mm depending on gauge) above the countersink where DIN 7972 finishes flat and flush.
How do the gauge sizes convert to metric diameters?
The gauges in the dimension table correspond to these diameters: 4g = 2.9mm, 6g = 3.5mm, 7g = 3.9mm, 8g = 4.2mm, 10g = 4.8mm, 12g = 5.5mm and 14g = 6.3mm.
What materials are available?
Steel zinc plated and A2 and A4 stainless steel. Send us your requirement and we will quote the material and finish to suit.
Need DIN 7973 Type AB in a non-standard size or material?
Send us your drawing — specials quoted within 24 hours.