Basic Information About Hex Head Bolt

Did you know that those Hex Head Bolts used to fix machines, furniture, and even your balcony clothes hanger are actually quite interesting little things. Last month, I helped my friend assemble a bookshelf and saw the power of this bolt - it can be easily tightened with an ordinary wrench, which is much more convenient than those bolts that require special tools.

The most obvious feature of this bolt is its hexagonal head. Although the shape is simple, this design has stood the test of time. The hexagonal head design allows the tool to grip better, especially suitable for use in places with limited space. For example, many of the densely packed parts in the engine compartment of a car are fixed with this bolt.

The family of hex head bolts is actually quite large. There are two common types: hex cap screws and large hex bolts. The former has higher precision and is suitable for occasions that require a perfect fit; the latter is more suitable for places where precision requirements are not so strict. Just like doing handicrafts, use small hex head screws for fine work and large hex head bolts for rough work.

Their strength should not be underestimated. For example, the common 12.9 grade high-strength alloy steel bolts are as hard as some tool steels. I have seen hexagonal head bolts used to fix steel structures on construction sites, each of which can withstand several tons of tension. However, it should be noted that bolts of different materials are suitable for different environments. Carbon steel is cheap and durable, but stainless steel has better rust resistance and is more suitable for use in humid environments.

Next time you DIY or repair something at home, you might as well pay attention to whether the bolts you use are hexagonal heads. This simple but practical small part is really an unsung hero in the engineering world!

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