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Home / Product / Screw / Self Tapping Screw / Stainless Steel A2-70 Cross Recessed Pan Head Self Tapping Screw DIN7981 For Metal Plate
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Stainless Steel A2-70 Cross Recessed Pan Head Self Tapping Screw DIN7981 For Metal Plate

Series: DIN7981
Model No.: 304HC-DIN7981
Brand: HAINA

Quantity:
  • din7981
  • HNF
  • 7318159090

Stainless Steel A2-70 Cross Recessed Pan Head Self Tapping Screw DIN7981 For Metal Plate

self-tapping screw is a screw that can tap its own hole as it is driven into the material. For hard substrates such as metal or hard plastics, the self-tapping ability is often created by cutting a gap in the continuity of the thread on the screw, generating a flute and cutting edge similar to those on a tap. Thus, whereas a regular machine screw cannot tap its own hole in a metal substrate, a self-tapping one can (within reasonable limits of substrate hardness and depth). For softer substrates such as wood or soft plastics, the self-tapping ability can come simply from a tip that tapers to a gimlet point (in which no flute is needed). Like the tip of a nail or gimlet, such a point forms the hole by displacement of the surrounding material rather than any chip -forming drilling/cutting/evacuating action.

 

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