What are the primary classifications of fastener bolts?

What are the primary classifications of fastener bolts?

In various machinery, equipment, vehicles, ships, railroads, bridges, buildings, structures, tools, instruments, meters, and supplies above the types of bolts.

1. Hexagonal head screw bolts with holes: screw made on the cotter pin holes over the wire hole, the use of mechanical relaxation, anti-loosening reliable

2. Hexagon head reamed bolts: Bolts with reamed holes can accurately fix the mutual position of the linked parts and withstand the shear and extrusion generated by the lateral mile.

3. Cross-groove concave hexagon head bolts are easy to install and tighten. They are mainly used for light industry, instruments, and meters with small loads.

4. Square-head bolts: The square-head size and stress surface are larger, making it convenient for the wrench to catch its head or rely on other parts to stop the rotation. They can also be used in parts with T-slots to adjust the position of the bolt. C-grade square-head bolts are commonly used in rougher structures.

5. Countersunk head bolts: Square neck or mortise and tenon bolts stop the rotation. They are mostly used when the surface of the connected parts requires flat or smooth surfaces.

6. T-slot bolts: T-slot bolts are suitable for occasions where the bolts can only be connected from one side of the connected parts. Insert the bolt from the T-slot and then rotate 90 degrees so that the bolt can not be dislodged. They can also be used for structural requirements of compact occasions.

7. Ground bolts: specially for the pre-buried soil foundation, for the fixed machine, the base of the equipment with live bolts, mainly used for the need to frequently dismantle the coupling of the place and the work equipment

8. High-strength bolts for the ball node of rigid frame bolts: high strength, mainly used for highway and railroad bridges, industrial and civil buildings, towers, and cranes.

Characteristics and uses of bolts

Hexagonal bolts: Hexagonal bolts are the most widely used class of bolts. Its A-grade and B-grade bolts are used for critical, high assembly accuracy requirements and to withstand significant shock, vibration, or alternating load occasions. Its C-grade bolts for the surface is relatively rough, assembly precision requirements are not high occasions. Threads on the bolt, generally for ordinary threads, West Asia common thread bolts self-lock better and are mainly used for thin-walled parts or to withstand the occasions of shock, vibration, or alternating loads. General bolts are made of part of the thread. Full-threaded bolts are mainly used for the shorter nominal length of the bolt and the requirement of longer threaded occasions.

Hexagonal flange bolts: the head of hexagonal flange bolts consists of a hexagonal head and flange surface of two parts; its "support area and stress area ratio" is greater than the ordinary hexagonal head bolts so that this bolt can withstand higher preload, anti-loosening performance is also better, and therefore is widely used in automobile engines, heavy machinery, and other products.

Hexagon head bolts with holes and grooves: when used, the bolts can be mechanically locked together and are reliable against loosening.

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Hexagon head screw bolts with holes: cotter pin holes are made on the screw over the wire holes, which are mechanically relaxed and reliably prevented from loosening.

Hexagon head bolts with reamed holes: These bolts can accurately fix the mutual position of the linked parts and withstand the shear and extrusion generated by the transversal mile.

Cross-recessed hexagonal head bolts are easy to install and tighten. They are mainly used for light industry and instrumentation with small loads.

Square head bolts: The square head size and stress surface are larger, making it convenient for the wrench to catch its head or rely on other parts to stop the rotation. They can also be used in parts with T-slots to adjust the position of the bolts. C-grade square head bolts are often used in rougher structures.

Countersunk head bolts: square neck or mortise and tenon function as stopping rotation and are mainly used when the surface of the connected parts must be flat or smooth.

T-slot bolts: T-slot bolts are used where the bolts can only be connected from one side of the connected parts. Insert the bolt from the T-slot and then rotate 90 degrees so that the bolt can not be dislodged; it can also be used for structural requirements of compact occasions.

Ground bolts: These are specially used in pre-buried soil foundations to fix the base of machines and other types of equipment.

Live bolts are primarily used to frequently dismantle the joints and work on the rigid grid bolt ball nodes with high strength bolts. They are mainly used for highway and railroad bridges, industrial and civil buildings, towers, and cranes.

The latest market demand makes the above special introduction to the primary classification of several bolts and their specific use in the scene. For example, T-slot bolts can be an excellent linkage of different styles of parts. At the same time, these parts can also be used as independent individuals, such as railroads in the sections or the linkage, which can be free to move, thus avoiding the linkage dead ends and affecting future maintenance. It is widely used in the relatively compact industrial environment.