China OEM China Molding Manufacturers Manufacturers – OEM ODM fastener customization service – RAISING-Elec

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Bolt connecting for steel structure is a connection method that connects more than two steel structure parts or components into one by bolts. Bolt connection is the simplest connection method in component pre assembly and structural installation. Bolted connection is the earliest used in metal structure installation. In the late 1930s, bolt connection was gradually replaced by rivet connection, which was only used as a temporary fixing measure in component assembly. High strength bolt connect...


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China OEM China Molding Manufacturers Manufacturers – OEM ODM fastener customization service – RAISING-Elec Detail:

Bolt connecting for steel structure is a connection method that connects more than two steel structure parts or components into one by bolts. Bolt connection is the simplest connection method in component pre assembly and structural installation.

Bolted connection is the earliest used in metal structure installation. In the late 1930s, bolt connection was gradually replaced by rivet connection, which was only used as a temporary fixing measure in component assembly. High strength bolt connection method appeared in the 1950s. High strength bolts are made of medium carbon steel or medium carbon alloy steel, and their strength is 2 ~ 3 times higher than that of ordinary bolts. High strength bolt connection has the advantages of convenient construction, safety and reliability. It has been applied in the manufacturing and installation of steel structures in some metallurgical plants since the 1960s.


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fastener 21
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fastener 27

Bolt specifications commonly used in steel structures include M12, M16, M20, M24 and M30. M is the bolt symbol and the number is the nominal diameter.

Bolts are divided into 10 grades according to performance grades: 3.6, 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9 and 12.9. Bolts above grade 8.8 are made of low-carbon alloy steel or medium carbon steel and are generally referred to as high-strength bolts after heat treatment (quenching and tempering), and bolts below grade 8.8 (excluding grade 8.8, refined ordinary bolts also include grade 8.8) are generally referred to as ordinary bolts. The following table shows the performance grade and mechanical properties of bolts.

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General Introduction (1)

● Wire-EDM : 6 Sets

● Brand: Seibu & Sodick

● Capability:  Roughness Ra<0.12  / Tolerance +/-0.001mm


Tooling Shop Extended in 2020  (1)


Tooling Shop Extended in 2020  (1)


Tooling Shop Extended in 2020  (2)

● Profile Grinder: 2 Sets

● Brand: WAIDA

● Capability: Roughness <0.05 / Tolerance +/-0.001


Tooling Shop Extended in 2020 (1)


Tooling Shop Extended in 2020 (2)


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Our personnel are generally in the spirit of "continuous improvement and excellence", and together with the outstanding top quality merchandise, favorable price tag and fantastic after-sales solutions, we try to gain every single customer's rely on for China OEM China Molding Manufacturers Manufacturers – OEM ODM fastener customization service – RAISING-Elec , The product will supply to all over the world, such as: Norwegian, Peru, Cambodia, Our company offers the full range from pre-sales to after-sales service, from product development to audit the use of maintenance, based on strong technical strength, superior product performance, reasonable prices and perfect service, we'll continue to develop, to deliver the high-quality items and services, and promote lasting cooperation with our customers, common development and create a better future.
Good quality and fast delivery, it's very nice. Some products have a little bit problem, but the supplier replaced timely, overall, we are satisfied.
5 Stars By Dominic from Bolivia - 2017.09.26 12:12
The factory workers have rich industry knowledge and operational experience, we learned a lot in working with them,we are extremely grateful that we can encount a good company has excellent wokers.
5 Stars By Ellen from Ukraine - 2017.10.23 10:29
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