Do You Really Understand Flanged Screw with Hexagonal Heads?

A Flanged Screw with Hexagonal Head is a bolt consisting of a hexagonal head, a flange, and a threaded rod, used with a nut to fasten two through holes. Ordinary bolts have thick heads, making them difficult to deform, and they are prone to loosening after tightening.

Compared to ordinary bolts, hexagonal flange bolts have a larger support area to stress area ratio, can withstand higher preload, and have better loosening performance. They are characterized by precise installation and strong durability. Hexagon Flange Headed Bolt Fastener has smaller heads with holes and are slotted bolts, allowing for a more secure lock even with slight deformation. The flanges come in flat-bottomed and toothed shapes, depending on industry needs; the latter provides better fastening.

Many people wonder why bolts are designed in a hexagonal shape, and not others. The hexagonal shape is a Fastening Screw with Flange and Hex Head of a compromise between side length and tightening angle.

For bolts with odd-numbered sides, the two sides of the wrench may not be parallel. Furthermore, early wrenches were only available in fork shape, and their heads were mostly flared, making them unsuitable for applying force. The tightening angle is also a crucial factor. For square bolts, the wrench needs to be turned 90 degrees to tighten the bolt, which is unsuitable for installation in confined spaces. For octagonal or decagonal bolts, while the tightening angle is smaller, the force applied is also smaller, making them prone to wear and rounding.

Therefore, hexagonal bolts are a more common choice.

Depending on the application location, the requirements for Hexagon Head Flange Bolt Screws vary. Generally speaking, hexagonal flange bolts are widely used in industrial and civil construction, cranes, excavators, and other heavy machinery.

Thin-shank flange bolts are advantageous for connections subjected to variable forces. Excavator bolt connections are distinguished by their force application methods: standard and reamed hole types. A Threaded Fastener of Flanged Hexagon Head Bolt requires a fit to the hole size when subjected to lateral forces. To meet the locking requirements after excavator installation, the shank has holes that prevent the bolt from loosening under vibration. When installing bolts on an excavator, the bolt head should be on the upper side of the connection. Apply pressure to both the nut and the bolt head simultaneously, from the center of the bolt connection to the edge (in all four directions), to tighten the bolts.

For corrosion protection and sealing of bolted connections, to prevent plastic deformation under external tension, a primer (such as epoxy resin, zinc powder, etc.) can be applied to the Flanged Hex Head Bolt contact surface, or the bolts themselves can have a coating.

Having learned about the wide range of applications and superior performance of hex bolts, if you're looking for a reliable and trustworthy brand, our flange-type hex bolts are the perfect choice. Our Hexagon Flange Headed Bolt Fasteners are manufactured to high standards and possess the following core advantages:

High-Strength Materials: Made with premium alloy steel, ensuring high-grade mechanical properties and strong load-bearing capacity.

Precise Anti-Slip Serrations: The serrations on the flange are precisely pressed, with sharp tips that effectively embed into the substrate during tightening, providing excellent anti-loosening performance.

Corrosion-Resistant Treatment: Offers a variety of plating options, such as galvanizing and hot-dip galvanizing, to meet the corrosion resistance requirements of different environments and extend service life.

Comprehensive Specifications: Covers a variety of standard sizes and lengths, and can provide customized production services to meet your specific needs.

Whether for critical connections in heavy-duty construction machinery or reliable fastening of everyday equipment, our Flanged Screw with Hexagonal Heads provides a stable and secure fastening solution.