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Refined carbon steel stainless steel U-bolts-1

Refined carbon steel stainless steel U-bolts

Refined hot-dip galvanized bolts

High strength precision machined T-bolts with superior performance

DIN933 304 A2-70 hexagonal bolt

DIN931 304 A2-70 hexagonal bolt

DIN 6921 Refined Flange Bolts for Enhanced Performance and Durability

DIN 913 914 915 916 Precision High Strength Tightening Bolt

DIN 912 refined hexagonal bolt cup head half round head flat head

DIN 603 refined carriage bolts

0102030405

China Suppliers Factory DIN 912 Hexagonal Bolt Cup Head Half Round Flat Head Grade 4.8 to 12.9

Our high-quality internal hexagonal screws are available in various grades including 4.8, 8.8, 10.9, and 12.9. Crafted from durable materials such as Q235, 35K, 45K, 40Cr, 20Mn Tib, 35Crmo, and 42Crmo, these screws are designed for exceptional performance in machinery applications. Our extensive surface treatment options, including Blackened, Electrogalvanized, Dacromet, Hot-dip Galvanized, and Galvanized, ensure corrosion resistance and longevity.

Internal hexagonal screws, sourced from trusted suppliers in China, offer distinct advantages such as easy tightening and disassembly with reduced slippage. The convenient design features a 90° bent internal hexagonal wrench, which has one longer and one shorter end. Utilizing the shorter end for tightening allows for greater torque by holding the longer end. The round head design facilitates easy insertion into screw holes, making disassembly straightforward. While external hexagonal wrenches are generally cheaper to produce, internal hexagonal screws are crucial in scenarios requiring more precision and strength, particularly in machinery with stringent operational demands. Choose our internal hexagonal screws from a reputable factory in China for reliable and cost-effective solutions for your engineering needs.

Product Detail

Characteristic

PRODUCTS

Q235 wire is commonly used for hex screws, and of course, iron screw wire is also used. The wire used for these screws can determine some of the characteristics of hex screws.

The first one is that the hardness of stainless steel screws is relatively high, but if it is made of iron, the hardness is significantly worse, which is related to the wire of the iron itself. The texture of iron itself belongs to a relatively soft category, which cannot be compared to stainless steel wire. However, in order to achieve the required hardness for iron screws, heat treatment is generally used to harden them.

During the heat treatment process, it is necessary to ensure that the screws are uniformly heated. Otherwise, not only will the hardness of the screws not meet the requirements, but it will also make them easy to bend, greatly increasing the production cost of hexagonal screws. After heat treatment, it is possible to increase the hardness of iron hexagonal screws, but due to wire issues, it is still not possible to compare the quality with stainless steel wire.

One thing to note for hex screws is to try not to let the screw head slip during use, otherwise it will be difficult to remove the screw in the future.

How to use bolts

USE

1. Anti-Loosening & High Tightening Effect

After the installation of the internal hexagonal bolt, the tightening effect is very good due to the tightening of the thread, and there will be no loosening of the bolt, which can effectively avoid the loosening problem caused by long-term vibration and vibration of mechanical equipment. At the same time, hexagonal bolts can also be used with locking washers, locking agents, and other auxiliary measures to prevent loosening, resulting in higher reliability.

2. Easy to install

During the installation process of the internal hexagonal bolt, only the internal hexagonal wrench is needed for operation, which is simple and convenient, reducing manual operation time and cost. Compared with other bolts, hexagonal bolts are less prone to damage during installation, can be reused, and have a longer service life.

3. Wide applicability

The biggest advantage of hexagonal bolts is that they have a wide range of applications. It can be applied to various industries and fields, including the automotive industry, aerospace, mechanical manufacturing, construction engineering, etc. During the manufacturing, installation, and maintenance processes, hexagonal bolts have also demonstrated excellent performance and reliability.

In summary: As one of the commonly used fasteners in mechanical equipment, internal hexagonal bolts have the advantages of high strength, good anti loosening effect, easy installation, and wide applicability, making them a very reliable fastener.

Frequently Asked Questions

FAQ

Q1 What raw materials are commonly used for manufacturing hex screws?

Q235 wire and standard iron screw wire are commonly used for hex screws. Stainless steel wire is also widely utilized where higher hardness and superior corrosion resistance are required.

Q2 How is the hardness of iron hexagonal screws enhanced?

Iron hexagonal screws undergo heat treatment to achieve the required hardness. The process requires precise, uniform heating to prevent bending and to keep manufacturing costs efficient.

Q3 Why is it critical to avoid slipping the hex screw head during installation?

Slipping or stripping the internal hexagonal head damages the drive socket, making future removal and maintenance extremely difficult.

Q4 How do internal hexagonal bolts resist loosening in high-vibration machinery?

Internal hexagonal bolts provide robust thread tightening. For maximum reliability under long-term vibration, they can be paired with locking washers or thread-locking agents.

Q5 What tools are required to install internal hexagonal bolts?

Only an internal hexagonal wrench (Allen key) is required for quick and convenient manual or automated assembly, helping reduce labor time and installation costs.

Q6 Which industrial fields utilize hexagonal bolts most frequently?

Hexagonal bolts are widely applied in automotive manufacturing, aerospace, machinery equipment production, structural construction, and engineering maintenance.