DIN 7972 Slotted Countersunk Self-Tapping Screws (Type AB)
We supply DIN 7972 slotted 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 2 (2.2mm) to gauge 14 (6.3mm). The slotted drive is the traditional pattern, still specified for restoration work and where a plain slot is preferred.
Also known as: slotted csk self tapper, slotted countersunk self tapping screw, slot head sheet metal screw, din7972, DIN 7972 C.
DIN 7972 Type AB dimensions
| Diameter/Gauge | Thread pitch | Head diameter | Head depth | Slot width |
|---|---|---|---|---|
| 2.2mm/2g | 0.98mm | 4.30mm | 1.30mm | – |
| 2.9mm/4g | 1.1mm | 5.5mm | 1.7mm | 0.8mm |
| 3.5mm/6g | 1.3mm | 6.8mm | 2.1mm | 1.0mm |
| 3.9mm/7g | 1.4mm | 7.5mm | 2.2mm | 1.0mm |
| 4.2mm/8g | 1.4mm | 8.1mm | 2.5mm | 1.2mm |
| 4.8mm/10g | 1.6mm | 9.5mm | 3.0mm | 1.2mm |
| 5.5mm/12g | 1.8mm | 10.8mm | 3.4mm | 1.6mm |
| 6.3mm/14g | 1.8mm | 12.4mm | 3.8mm | 1.6mm |
Materials & strength
Slotted drive
Traditional straight slot - driven with a flat blade, and often specified for period or restoration work.
Countersunk head
Sits flush with the work surface when driven into a countersunk hole.
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 7972?
DIN 7982 is the same countersunk Type AB self-tapper with a pozi recess in place of the slot - the more common choice for powered driving.
What does Type AB mean?
Type AB is the spaced self-tapping thread with a sharp gimlet point - DIN point form C, so these screws are often listed as DIN 7972 C.
How do the gauge sizes convert to metric diameters?
The gauges in the dimension table correspond to these diameters: 2g = 2.2mm, 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 7972 Type AB in a non-standard size or material?
Send us your drawing — specials quoted within 24 hours.