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A Complete Guide to Hex Bolts

February 16,2023

A Comprehensive Guide on Hex Bolts

Hex bolts are a type of fastener that is widely utilized in a range of applications. They are also available in a variety of lengths, threading types, and material alternatives.

Hex bolts are often constructed of steel that has been hardened and/or heat treated. They can be produced from a variety of steel alloys.

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Hex flange bolt come in a wide variety of diameters. These fasteners are widely utilized in the construction, engineering, and home improvement industries. They are available in a variety of materials, including steel and stainless steel.

Cold forming is the method used to create hex fasteners. This process necessitates the use of a specialized machine to shape and size large steel wire rods.

To estimate the size of a bolt, you must first know its diameter, length, and pitch. The diameter is the width of the bolt's shank, and the length is the distance from the end of the chamfer to the bottom of the head.

Partially threaded bolts have a plain surface just under the head, but fully threaded bolts have a thread pattern along the shaft. This surface is more resistant to shearing movements than the threaded portion of the bolt. Partially threaded bolts are also less prone to bending or twisting than fully threaded counterparts.

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Hex bolts are constructed of steel, which comes in a variety of strengths and grades. The greater the strength, the better the performance in an application.

Another typical material for hex bolts is stainless steel, one example is ss 304 316 hex flange bolts. Because of its high corrosion resistance, it is widely employed in a variety of applications.

Stainless steel is not only corrosion-resistant, but it is also strong. However, it is susceptible to thread galling and seizing.

These are the consequences of destroying the self-generated chromium oxide coating during tightening.

These issues are typically avoided by applying lubricants on the nut and bolt. Furthermore, stainless steel alloys with varying hardnesses, such as 316 and 304, have a lower tendency to gall.


Hex bolts are constructed of various grades of steel and are classified based on their tensile strength. To illustrate their strength, they are denoted by higher digits or dashes.

Hex bolts are typically made of medium quality carbon steel. They are heat treated and function admirably in the majority of applications.

Hex cap screws in grades 5 and 8 are available for enhanced strength. These grades have a tensile strength of 150,000 pounds per square inch and are fully heat treated.

Grade 8 hex bolts have a greater core Rockwell hardness than grade 5. They are also less likely to gall or seize.

They can be used to secure components together with a variety of fastening tools. They are also widely used in structural, mechanical, and automotive applications.

The installation of hex bolts and hex cap screws differs. Hex nuts are used to tighten bolts, while cap screws are inserted into tapped holes.


Hex bolts and nuts come in a variety of designs, sizes, and finishes. The bolts' finish can affect their function, durability, and strength.

The bolt finish can vary depending on the material, thread type, and use. The bolts' polish can also affect torque values and the clamping force they provide.

Hex bolts are made of either low carbon steel or stainless steel. The finish will be simple or zinc plated, depending on the material and grade. In a typical environment, the zinc coating slows the corrosion rate.