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Bolts are basic fasteners. They are usually used in conjunction with nuts because they have strong clamping force, reliability and versatility, and thus are highly valued. Their manufacturing materials are usually brass, carbon steel and stainless steel, etc. They are designed to assemble components through pre-drilled holes to form safe non-permanent connections and are commonly seen in the automotive, industrial machinery, electronic and aerospace fields.

Common Types of Bolts
Bolts come in a wide array of types, each engineered for specific applications and load requirements. Common varieties include:

Hex Bolts: Hexagonal heads are used for wrench or socket fastening, providing excellent torque transmission. It is widely used in the foundation construction of heavy machinery, automated production lines and the fixation of high-load equipment.

Socket Head Cap Bolts:  Boast a cylindrical head with an internal hex drive (Allen), offering a compact profile and high clamping force. Suitable for applications with space constraints, commonly used in precision equipment, automation systems, and enclosures.​

Flange Bolts: Integrate a circular flange under the head that acts as a built-in, distributed washer. This provides a larger bearing surface, excellent for securing components in automotive assemblies, fluid power systems, and sheet metal applications.​

Headless Bolts: Offer a low-profile design with no exposed head, installed via internal drive or threaded ends. Deliver flush surfaces, even load distribution, and are ideal for tight spaces and sleek designs in precision mechanics, fixtures, and motion systems.

Applications of Bolts

Industrial Machinery & Automation

Construction of various industrial assembly frames, component fixation of printing machinery, structural connection of conveyor systems, precise installation of robotic arms, and base fixation of motors, among other application scenarios.

Automotive & Transportation

Main applications: It is suitable for key parts such as engine block connection, chassis structure assembly, transmission system fixation, and brake caliper installation.

Core function: It can maintain reliable connection under severe vibration, significant temperature changes and complex force conditions, ensuring the safety of vehicle operation and meeting the requirements of long-term durability.

Aerospace & Aviation
Common applications: including fuselage cross-section connection, interior panel fixation, cabin door installation and non-critical flight control connection components, etc.

Performance requirements: The fastening solution must balance lightweight and high strength characteristics, meet strict material specifications, and maintain stable and reliable connections in extreme environments such as vibration and temperature differences

Electronics & Electrical Systems
Main applications: It is used for the installation of distribution boards, the fixation of transformers, the support of large capacitors, and the effective grounding of server racks.

Functional features: While providing a stable mechanical connection, it ensures excellent electrical conductivity and electrical contact reliability. The selection of materials should focus on the performance of resisting electrochemical corrosion.

Energy & Heavy Equipment
Main applications: It is used for the installation of distribution boards, the fixation of transformers, the support of large capacitors, and the effective grounding of server racks.

Functional features: While providing a stable mechanical connection, it ensures excellent electrical conductivity and electrical contact reliability. The selection of materials should focus on the performance of resisting electrochemical corrosion.

How To Order Custom Bolts

At Yuhuang, ordering custom bolts is a streamlined and efficient process:

Specification Definition: Determine your requirements, including material grade (e.g., Grade 4.8, 8.8, 316 SS), bolt type, dimensions (diameter, length, thread pitch), head style, drive type, and any special coatings or platings (e.g., zinc, nickel).

Consultation Initiation: Contact our team to discuss your needs. Our experts will provide tailored advice on the optimal bolt specification for your application's load, environmental, and technical requirements.

Order Confirmation: Finalize order details such as quantity, delivery schedule, and pricing. Production begins promptly upon your approval.

Timely Fulfillment: Your order receives priority handling to ensure on-time delivery, supported by our efficient manufacturing and logistics processes.

Our customers also frequently buy:

Nuts

Washers

Wrenches

Spring

FAQ

Q: What are the differences in the uses of bolts compared to screws?

A: Most bolt tightening requires the use of nuts. When installing, pass through a hole without threads and then lock it with a nut. Screws, on the other hand, can be directly screwed into the workpiece and connected through threads.

Q: How should the strength grades on bolts be understood (such as 8.8, 10.9)?

A: The number before the decimal point represents the tensile strength, and the number after the decimal point represents the yield ratio. The higher the value, the greater the intensity. For instance, bolts of grade 10.9 have stronger performance than those of grade 8.8.

Q: How to select bolt materials based on the usage environment?

A: Carbon steel is fine for general environments. Stainless steel (such as 304 and 316) is more suitable for damp or corrosive places. If both anti-corrosion and non-magnetic properties are required, brass material can be considered.

 Q: Can you provide the matching nuts and washers?

A: We can provide nuts and washers (including anti-loosening washers) of corresponding specifications and surface treatments as a set to ensure a perfect match of the entire set of accessories.

Q: Are special size customizations accepted?

A: We support customizing bolts of special lengths and thread specifications, and can provide relevant technical consultation and sample confirmation services.