Hex Head Machine Screw High Strength Trim Metric Bolt Black Zinc Coating

Hex head machine screw has a hexagonal head and machine threads for use with a nut or in a tapped hole. Also known as hex screw or machine bolt. Hex cap screw features a washer face under the head and a chamfered point, whereas a hex bolt does not have a washer face or chamfered threads. They are made of low-carbon steel and are very common in construction or repair projects. Hex bolt is a very common choice when it comes to construction and repair. Hexagon screw head bolts come in a large variety of sizes and diameters. The best way to choose the right hex bolt is to find the bolt material that best suits your needs. Ever Hardware provides custom-made fasteners and customizable packaging.

The primary purpose of zinc plating is to protect metals from the effects of corrosion or rust. Zinc Plated coatings are “sacrificial” coatings – meaning the coating sacrifices itself in order to protect the substrate beneath, as the coating oxidizes the corrosion itself continues to provide a level of protection to the substrate.
Zinc plating comes in different colors – but each of the colors can result from the type of plating formulation used – meaning that they do not necessarily have the same resulting corrosion resistance properties as each other. Further, zinc plating types also vary in their ability to protect from both “red” (iron-related) and “white” (alloy related) corrosion types. Some suppliers use a black oxide coating or dye over the surface of zinc plating (e.g. olive drab) and call it black zinc. Others use formulations that are actually black plated. The level of corrosion resistance of the latter will be somewhat lower than that of gold zinc – but better than clear passivate. The oxide-coated versions will tend to offer slightly better resistance due to the additional coating and depending on the underlying type of zinc used.

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