Introduction to Titanium Standard Parts Manufacturers: Relevant Knowledge of Internal Hexagonal Bolts!

The so-called internal hexagonal bolt refers to a cylinder head with an internal hexagonal shape, which can also be abbreviated as internal hexagonal bolt, internal hexagonal cylinder head bolt, or internal hexagonal bolt. Why are there six corners instead of four or five? Many people ask, why design a hexagon instead of four, five, or other shapes? Rotating the hexagonal bolt 60 ° can restore the shape. If the space is small, simply rotate the wrench 60 degrees to install the screw. This is a compromise between twist angle and side length.

If it is square and has a long side, but needs to be twisted 90 degrees to restore its shape, it is not suitable for installation in small spaces; If it is an octagonal or decagonal shape, the recovery angle of the shape is small, but the length of the stressed edge is also small, making it easy to round. If the side length of the screw is odd, it indicates that the two sides of the wrench are not parallel. In the early days, there were only forked wrenches. The side length of the wrench head is strange, it has a bell mouth and is not suitable for applying force.

Titanium standard parts manufacturer introduces the hardness and performance of hexagonal bolts:

Generally speaking, commonly used hexagonal bolts include 4.8, 8.8, 10.9, 12.9, etc. Generally, different grades of hexagonal bolts will be selected according to different needs, which is more conducive to the performance of bolts. Let's take a look at the hardness level of hexagonal bolts.

Hardness grade of hexagonal bolts:

Internal hexagonal bolts are classified according to the hardness, tensile strength, and yield strength of the threads. This is the grade of the hexagon socket bolt. What is the grade of the hexagon socket bolt. Different product materials require different grades of hexagonal bolts to correspond.

Internal hexagonal bolts are classified into ordinary bolts and high-strength bolts according to their strength level. Ordinary hexagonal bolts are grade 4.8, high-strength hexagonal bolts are grade 8.8 or higher, including grades 10.9 and 12.9. 12.9 type internal hexagonal bolt usually refers to a natural black oil coated hexagonal head knurled screw.