Screws for plastic cross flat head yellow zinc plating self tapping screws
Screws for plastic are the screws with flat end self tapping thread. The screws are mostly with heat treating finished for high tensile and galvanized for anti rust. Ever Hardware provides custom made screws for plastic 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.
Zinc coatings prevent oxidation of the screws for plastic by forming a barrier and by acting as a sacrificial anode if this barrier is damaged. Zinc oxide is a fine white dust that (in contrast to iron oxide) does not cause a breakdown of the substrate’s surface integrity as it is formed. Indeed, the zinc oxide, if undisturbed, can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminum and stainless steels by their oxide layers. The majority of hardware parts are zinc-plated, rather than cadmium-plated.
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|Category||Screws for plastic|
|Finish||Heat treating & Galvanized|
|Thread||Plastic tapping threaded or as request|
|Material||Teflon/Brass/Stainless steel/carbon steel/Aluminum|
|Place of origin||China Mainland|
|Size option||M1.0 to M30 or #0 to 1-1/8″|
|Color||Yellow or as request|