Classification of hex bolts and nuts

Hex bolts and nuts are parts consisting of hexagonal bolts and hexagonal nuts. A hex bolt is a fastener consisting of a head and screw, and the bolt is divided into an iron bolt and stainless steel bolt according to the material. Hexagon nuts can be divided into many types according to the different nuts, there are hexagonal nuts, there are round nuts, square nuts, and so on, and different kinds of nuts have different standards. Next, let's learn more about the classification of hex bolts and nuts.

Here is the content list:

• Hex bolt classification

• Hexagon nuts classification

Hex bolt classification

1. According to the way of connecting force, there are ordinary ones and those with hinged holes. The bolts with hinged holes have to be matched with the size of the holes and are used when they are subjected to lateral force.

2. According to the head shape, there are hexagonal heads, round heads, square heads, countersunk heads, etc. Generally, the countersunk head is used in places where the surface is smooth and without protrusion after the connection, because the countersunk head can be screwed into the parts. The tightening force of the square head can be larger, but the size is huge. The six-head is the most common in our daily life. In addition, to meet the need for locking after installation, there are holes in the head and holes in the rod, which can make the hex bolt and nuts not loosen when subjected to vibration.

3. In addition, there are special uses: T-slot bolts, the most used in machine tool fixtures, special shape, and the head on both sides to cut off. The ground bolts are used to connect the machine and the ground, and there are many kinds of shapes, U-shaped bolts. There are also special studs for welding, one end has a thread and one end does not, which can be welded on the parts, and the other side is directly screwed with hex bolts and nuts.

Hex nuts classification

Hex bolts and nuts are used in conjunction with screws and bolts to connect and fasten machine parts. Hexagon nuts are divided into type I, type II, and thin according to the nominal thickness. And the nuts above grade 8 are divided into two types type I and type II. I type of hexagon nuts are most widely used, I type nuts and divided into A, B, and C three levels, of which A and B level nuts for the surface roughness is small, high requirements for precision machines, equipment, and structures, and C level nuts are used for the surface is relatively rough, the requirements for precision is not high. On machines, equipment, or structures. The thickness of type II hexagonal nuts is thicker, and they are mostly used in occasions where assembly and disassembly are often required.

Type I nut refers to the nominal height of the nut m ≥ 0.8D ordinary hexagonal nuts; while the height of the type II nut than the type I nut is higher. The purpose of increasing the type II nut has two: one is to increase the height of the nut to get a kind of heat treatment that is not required, relatively inexpensive nuts. The other purpose of specifying Type II nuts is to obtain a tougher Grade 12 nut. Due to the increased height of the nut, the guaranteed stress index can be achieved at a lower hardness of quenching and tempering, so the toughness of the nut is increased.

The above is the relevant content about the classification of hex bolts and nuts. If you are interested in hex bolts and nuts, you can contact us, our website is www. suqingfasteners.com. I look forward to your arrival very much and hope to cooperate with you.