DIN 7981 pan head tapping screw: dimensions
Pan head tapping screw with ST thread and pointed end (type C), from ST2.2 to ST6.3.
DIN 7981 dimensions
| ST | Pmm | dkmax, mm | kmax, mm | rfapprox, mm | Hno., mm | mref, mm | ymax, mm |
|---|---|---|---|---|---|---|---|
| ST2.2 | 0.8 | 4.2 | 1.8 | 3.4 | 1 | 2.6 | 2 |
| ST2.9 | 1.1 | 5.6 | 2.2 | 4.4 | 1 | 3 | 2.6 |
| ST3.5 | 1.3 | 6.9 | 2.6 | 5.4 | 2 | 4.2 | 3.2 |
| ST4.2 | 1.4 | 8.2 | 3.05 | 6.2 | 2 | 4.6 | 3.7 |
| ST4.8 | 1.6 | 9.5 | 3.55 | 7.2 | 2 | 5 | 4.3 |
| ST5.5 | 1.8 | 10.8 | 3.95 | 8.2 | 3 | 6.5 | 5 |
| ST6.3 | 1.8 | 12.5 | 4.55 | 9.5 | 3 | 7.1 | 6 |
Dimensions in millimetres unless stated. Select a row to load its CAD files above.
DIN 7981 thread and type C point
The size is the ST thread diameter in mm. The type C point has length y. The files show the shank to the thread diameter with its cone point; the thread is cosmetic.
The cross recess in the CAD files is a simplified shape for drawings and assemblies, sized by the recess diameter m. It is not the exact Phillips or Pozidriv geometry.
DIN 7981 and ISO 7049
ISO 7049 is the international standard for the same cross recessed pan head tapping screw, and the two names are used side by side in catalogues. The files here follow the DIN 7981 table. At ST3.5 the head is up to 6.9 mm across and 2.6 mm high, with a size 2 recess.