Self-drilling screws
The concept of self-drilling screws came out of the need for speed and the realisation that by putting a cutting face on the end of a power driven screw it could cut its own hole and immediately generate a female thread, so saving a considerable amount of time. In the case of self-drilling Tek type screws, with integral sealing washer, Challenge Europe says this time saving is increased, together with the added functional improvement of instantaneous sealing.



