External Wood Screws Self Tapping Outdoor Repair Working Zinc Coated

The external wood screws are also known as lag screws. Lag screws also commonly known as lag bolts, lag screws are some of the toughest fasteners. Lag bolts are used in wood construction for heavier load applications than most wood screws can support. These extremely sturdy fasteners are usually used to connect heavy lumber or other heavy materials that are bearing an intense load.. Ever Hardware provides custom-made external wood screws and customizable packaging.
Zinc coatings prevent oxidation of the protected metal 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.

A self-tapping wood screw is a wood screw that can tap its own hole as it is driven into the wood. 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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