Countersunk self tapping screws long self tapping screws steel screws
Countersunk self tapping screws are the screws with countersunk head and self tapping threaded. The screws are usually with heat treating finished. Ever Hardware provides custom made countersunk self tapping screws and customizable packaging.
A countersink is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common use is to allow the head of a countersunk bolt or screw, when placed in the hole, to sit flush with or below the surface of the surrounding material (by comparison, a counterbore makes a flat-bottomed hole that might be used with a socket-head capscrew). A countersink may also be used to remove the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges.
A 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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|Category||Countersunk self tapping screws|
|Finish||Heat treating & Galvanizing|
|Thread type||Self tapping threaded|
|Material||Steel or Stainless steel/Aluminum/Titanium|
|Place of origin||China Mainland|
|Size option||M1.0 to M30|