Countersunk head tapping screws also known as KA screws. 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. Ever Hardware provides custom-made fasteners and customizable packaging.

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 Head Tapping Screws
Finish Electro-Plating
Thread type Metric/Imperial/According to Request
Material Stainless Steel/Carbon Steel/Aluminum/Brass/Copper, etc.
Brand Ever Hardware
Place of origin China Mainland
Size Customized as required
Countersunk head tapping screws cross recessed philips for electronics

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What Client’s Say

Those look great! All the specs look perfect.
Kent De Mond
Perfect ! This is that I need.
Hernán Balboa
Thank you very much.
The bolts are perfect and they’re fits good.
Ashley
The nut fits perfect on our M2.5 screw part.
Height is also ok.
Mirjam
I tested the bolts this morning and they are perfect. Thank you so much.
Bill McDonald

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