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Roofing Bolt&Nut

Roofing BOLT and NUT: The Ultimate Guide


While you are choosing to purchase quality roofing bolts and nuts, there are a few important points to know before you begin.



The benefits of using Roofing bolts and nuts

The different types of Roofing bolts and nuts

Analysis of mechanical properties of bolts and nuts

Common nut standards

China roofing fasteners supplier

Roofing fasteners supplier




Roofing BOLT and NUT


When it comes to fastening two pieces of metal together, there are few options more tried-and-true than the Roofing bolt and nut. This simple yet effective duo has been in use for centuries, and for good reason. Roofing Bolts and nuts are strong and reliable, making them ideal for a wide range of applications. 

Whether you're building a wooden deck or assembling a piece of machinery, bolts and nuts are up to the task. They're easy to use, too - simply thread the bolt through the holes in your materials and secure it in place with a nut. No special tools or skills are required.


If you need a fastener that you can count on, look no further than the humble bolt and nut. For strength, reliability, and ease of use, they can't be beat!




The benefits of using Roofing bolts and nuts


Bolts and nuts are two of the most commonly used fasteners. They are simple to use and provide a strong connection between two pieces of material. While bolts are usually used in conjunction with nuts, they can also be used alone. Bolts are available in a variety of sizes and materials, making them ideal for a wide range of applications. Nuts are also available in a variety of sizes and materials, making them ideal for use with a variety of different bolts.




The different types of Roofing bolts and nuts


Roofing Bolts are one type of fastener used to join two or more pieces of material together. Roofing Bolts come in a variety of sizes, shapes and materials, each with its own unique benefits and applications. 

Nuts are another type of fastener used to join two or more pieces of material together. Nuts come in a variety of sizes, shapes and materials, each with its own unique benefits and applications.


There are many different types of Roofing bolts and nuts available on the market, each with its own specific purpose and advantages. Selecting the right type of Roofing bolt or nut for a particular application is critical to ensure a strong and secure connection.





Analysis of mechanical properties of Roofing bolts and nuts


One of the most direct performance parameters to determine whether a material is strong or weak is hardness.

Generally, bolts above grade 8.8 and nuts above grade 8 belong to high strength fasteners. In order to ensure the hardness of the parts, appropriate heat treatment process should be used.

The following table shows the strength data of Roofing nuts and bolts.


• The hardness of class 8 nuts less than M16 is 200-302HV, and the hardness of class 8.8 bolts less than M16 is 250-320HV;


• The hardness of class 10 nuts less than M16 is 272-353HV, and the hardness of class 10.9 bolts less than M16 is 320-380hV.


From the perspective of comparison, the hardness of the nut is slightly lower than that of the bolt, that is, the strength of the bolt is higher.



                                       Nut hardness                                                                                                                                     Bolt hardness

螺母硬度                                              螺栓硬度




Common nut standards


GB41 hexagon nuts, type ⅰ - Class C

GB6170 Hexagon nuts, type ⅰ - Class A and B

GB6171 Hexagon nuts, type ⅰ - Fine teeth - class A and B

Hexagon thin nuts, class A and B, chamfered

Hexagon thin nuts -- Fine teeth -- Class A and B

Hexagon thin nuts, class B, without chamfering

GB6175 Type ⅱ hexagon nuts - class A and B

GB6176 type ⅱ hexagon nuts - Fine teeth - class A, B

GB6177 hexagon flange nuts - Class A

GB55 hexagon thick nut

GB56 hexagon super thick nut

Hexagon nuts GB1229 (high strength for steel structures)




China roofing fasteners supplier


China Roofing fasteners supplier is a professional roofing fasteners manufacturer and exporter in China. Our main products are roofing nails, roofing screws, roofing bolts, and other related roofing fasteners with high quality and competitive prices.


Roofing fasteners are one of the most important aspects of roof installation. They hold the roofing material together and ensure proper installation and maintenance. There are a variety of fasteners available, each with specific functions and benefits.


Roofing fasteners are widely used in many construction projects. They are a popular choice because they are easy to use, long-lasting and require little maintenance. Roof fasteners are used in a wide variety of applications including residential, commercial, institutional, and industrial applications.




Roofing fasteners supplier


They can be used to attach roofing materials to buildings, or to hold materials in place when installing roofs. Types of Roofing fasteners include nails, screws, and staples. Roofing fasteners from China come in many shapes and sizes, are high quality, and are very affordable prices.


Roofing fasteners are used for a variety of reasons, but one of the main benefits is their durability. Roofing fasteners can be used for years without replacement, which is great news for homeowners looking to save money in the long run. Plus, Roofing fasteners are more effective than traditional roofing materials, so you get more out of your investment.

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