Rough Hexagon Head Screws

To make them work better and last longer, Rough Hexagon Head Screws get different surface treatments. Zinc plating—clear, yellow, or black—is the most common. It keeps them from rusting a bit and makes them look a little nicer.

The hot-dip galvanizing process produces a thick and strong zinc layer on the surface of the material. This zinc layer can provide reliable protection for the substrate and is a practical protection solution for places exposed to harsh outdoor environments (such as rainy and strong UV areas) for a long time or in places with severe corrosion. There are other options too: phosphate coatings, which help paint stick better and resist rust more; black oxide, which affects how they look and gives a little rust protection; and geomet coatings, which are dry lubricants that help with consistent torque. Stainless steel hexagon head screws usually don’t get treated, or they’re passivated instead.

Product Parameters

Strictly follow international standards

Rough Hexagon Head Screws follow strict international standards (like ISO 4014/4017, DIN 931/933, ASME B18.2.1, JIS B1180) that set their sizes. Main specs include the thread diameter (like M6 or 1/4"), thread pitch (coarse or fine), length (measured under the head), and head sizes (width across the flat sides, height).

Regular hexagon head screws usually have shanks that are only partially threaded (like ISO 4014, DIN 931). Fully threaded fasteners are divided into two categories: hexagonal head bolts that comply with ISO 4017 and DIN 933 standards; and set screws that are different from the former and often use proprietary standards such as ISO 4026 and DIN 913. Their sizes make sure they can be swapped out for each other when needed.

FAQ

Q:Are your Rough Hexagon Head Screws supplied with coarse thread (UNC) or fine thread (UNF), and can I specify?

A:Our standard Rough Hexagon Head Screws in stock usually have coarse threads—like UNC or ISO Metric coarse. These are the most common. They’re quick to put together and can handle a little damage without issues.

But we also have fine thread ones, like UNF or ISO Metric fine. These let you adjust more precisely. In some sizes, they’re stronger, and they don’t come loose as easily when there’s vibration. For any order, just let us know which thread type you need.