Specifications and Features of Hexagon Flange Bolts Wholesale Factory of Hexagon Flange Bolts and Nuts

The hexagon flange bolt is an essential industrial component, extensively employed in highway and railway bridges, industrial and civil structures, cranes, excavators, and other heavy machinery due to its precise construction and robust durability. As market demands evolve, various new types of hexagon flange bolts have emerged. For instance, cross-recessed hexagon head bolts complement traditional hexagon flange bolts. Now, let's delve into hexagon flange bolts' fundamental specifications and characteristics.

The hexagon bolt is the most commonly utilized type. Grade A and B bolts are employed in critical applications with high precision assembly requirements and capable of withstanding significant impacts, vibrations, or alternating loads. Grade C bolts, with rough surfaces and lower assembly precision requirements, are used occasionally. The threads on these bolts are typically standard, and common thread bolts in Western Asia exhibit excellent self-locking performance. They are primarily used in thin-walled parts or applications subject to impact, vibration, or alternating loads. Generally, bolts feature partial threads, while full-thread bolts are predominantly used for shorter nominal lengths or applications necessitating longer threads.

Specification of hexagon flange bolt

50. Gb/t5789-1986 hexagon flange bolt enlarged series grade B
50. Gb/t5790-1986 hexagon flange bolt enlarged series thin rod class B.
50. Gb/t16674.1-2004 hexagon flange bolt small series
50. Gb/t16674.2-2004 hexagon flange bolt fine-tooth small series
50. National standard for hexagon flange bolt gb/t16674.2-2004

The standard specifies thread specifications ranging from M8 × 1 to M16 × 1.5, with fine threads, and performance grades of 8.8, 9.8, 10.9, 12.9, and A2-70. The product falls under grade A, featuring a small hexagon series with fine threads.

The marking method shall be by GB/t1237.

The thread specification is d=m12 × 1.25, featuring fine threads, with a nominal length of l=80mm. Manufacturers have the option to choose between F-type or U-type, with a performance grade of 8.8. The surface treatment is oxidation, and the product is classified under grade A, belonging to the small hexagon series of hexagon flange bolts.

Bolt GB/t16672.2 M12 × one point two five × eighty.

Features of flange bolt connection

The flange bolt connection boasts numerous advantages, including quick and straightforward installation, easy assembly and disassembly, high-pressure bearing capacity, excellent stress performance, and reliable safety. Its key characteristics include:

50. Enhance the structural stress condition. Friction-type high-strength bolt connections transmit force through friction on the steel plate's surface. This method increases the force transmission area and mitigates stress concentration, thereby enhancing the fatigue strength of components.
50. With fewer bolts, high-strength bolts offer substantial bearing capacity. For instance, a 40-boron steel bolt with a D = 22 mm diameter boasts significant bearing capacity. In comparison, the shear strength of a typical rivet with a diameter of 23 mm is lower. Specifically, the bearing capacity of flange bolts surpasses that of rivets by approximately 18%. Therefore, fewer high-strength bolts are required under stress conditions equivalent to rivets.
50. Accelerate construction progress. High-strength flange bolt installation is straightforward, allowing workers with minimal training to perform the task efficiently after receiving basic instructions.
50. During transportation, steel structures secured with high-strength flange bolts are less prone to loosening, reducing maintenance requirements. Individual bolts can be replaced without impacting the surrounding bolt connections when loosening.
50. Construction labor conditions are optimized, as bolt holes can be formed immediately in the factory, eliminating the need for secondary hole expansion.

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