Stainless Steel Double-Ended Bolt

Product introduction

This product is a typical non-standard part. Its structural feature is that both ends of the rod are processed with standard threads, and the middle is a polished rod. The threads at both ends can be of equal or unequal length. As a common category of 304 non-standard parts, its key design is:

Double-ended thread structure: The threads at both ends can be connected to different components respectively. It is suitable for scenes that require double-end fixation. The connection is stable and not easy to slip.

Surface treatment process: using shock-optical treatment, the threads are even and smooth, with few burrs, making it easy to install and engage.

Material advantages: 304 stainless steel has good rust resistance and wear resistance, and can be used in a variety of environments

When standard length or thread specifications cannot meet the needs, customizing non-standard fasteners is a common choice - the thread profile, rod length, and thread ratio at both ends can be adjusted as needed.

 

Stainless steel stud bolts belong to the category of non-standard parts. We can mass-produce cold-headed non-standard parts, 304 non-standard parts, and special-shaped stainless steel bolt parts. We specialize in undertaking various types of customized non-standard fasteners and can be used as precision automotive parts fasteners. Both ends of the product are threaded, suitable for thick plate and closed cavity assembly scenarios. It is formed by cold heading and precision turning processes, with high thread precision and excellent corrosion resistance. The manufacturer supports adjusting the thread length, rod diameter, and total length based on drawings and samples, and can develop special-shaped stainless steel bolt parts such as unequal-length threads and stepped styles. The mainstream materials are 304 and 316 stainless steel, which are widely used in automobile assembly, chemical equipment, and new energy equipment. We provide one-stop services from sample trial production to mass delivery, and provide stable and reliable customized non-standard fastener solutions to global buyers.

 

Materials and application fields

304 non-standard parts (stainless steel 304), rust-proof and wear-resistant, excellent overall performance, mechanical equipment, piping systems

Stainless steel 316, pitting corrosion resistance, seawater corrosion resistance, marine engineering, chemical equipment

Alloy steel, high strength, fatigue resistance, heavy-duty machinery, wind power equipment

Core application scenarios (extensive use of automotive parts fasteners):

Industrial machinery and equipment: fixed connections of bearing seats, gearboxes and other components

Pipeline installation project: Tighten the flange joints to ensure a tight connection

Automobile manufacturing, repair and modification: Chassis and engine peripheral parts fixing

Electrical equipment: fixation of metal components inside the distribution box

When stud bolts require special shapes (such as with positioning steps, special-shaped polished rods), customized non-standard fasteners are the optimal solution.

 

Quality control and certification system

For special-shaped stainless steel bolt parts and non-standard parts, we have established a special inspection process:

Full inspection of geometric dimensions: Thread tolerances at both ends (6g level), total length, and thread length are inspected using an image screening machine to ensure precise matching with standard nuts.

Mechanical property testing: tensile strength testing, hardness testing

Surface and anti-corrosion: salt spray test (304 material neutral salt spray ≥96 hours)

 

Certification system:

ISO 9001:2015-1-5

IATF 16949 (applicable to bulk supply of automotive parts fasteners)

Comply with GB/T, DIN, ISO and other standard system requirements

Customized services (focus on non-standard customization)

We focus on the R&D and mass production of customized non-standard fasteners. We can provide the following customization directions for stainless steel stud bolts:

Non-standard length and specifications: The total length of the bolt and the thread ratio at both ends can be customized according to the working conditions-2

Non-standard thread specifications: fine thread, coarse thread, non-standard pitch available

Special shape customization: customized non-standard fasteners with positioning steps, special-shaped polished rods, unequal length double heads, etc.

Cold heading non-standard parts: The cold heading non-standard parts process can be used for small batches and cold heading for large batches, with lower cost and better consistency.

Non-standard surface treatment: passivation, polishing, galvanizing, Dacromet, etc.

Customers provide 2D/3D drawings, samples or assembly descriptions. We provide full-process services from cold heading mold development, heat treatment, surface treatment to mass production.

 

FAQ

Q: What is the difference between stainless steel stud bolts and ordinary bolts?

A: Ordinary bolts only have threads on one end and are used with nuts; this product is a special-shaped stainless steel bolt part with threads on both ends. It can connect two parts or threaded holes at the same time, and is suitable for scenarios where both ends need to be fixed.

 

Q: What is the corrosion resistance of 304 stainless steel stud bolts?

A: 304 non-standard parts have good anti-rust properties and are suitable for most indoor and general outdoor environments. If used in seawater or strong acid-base environment, it is recommended to upgrade to 316 material.

 

Q: Can this bolt be used in automobile manufacturing?

A: Absolutely. Stud bolts are used in automobile chassis, engine periphery and fuse boxes. They are a typical category of automotive parts fasteners and can meet the requirements of IATF 16949 quality system.

 

Q: What are cold heading non-standard parts?

A: Cold heading is a process that forms parts through plastic deformation of metal. Compared with machining, it saves material, has higher product strength and higher production efficiency. For low-volume requirements for customized non-standard fasteners, the cold heading process can significantly reduce costs.

 

Q: What is the minimum order quantity? Can I make a sample?

A: The minimum quantity for the sample stage is 200-500 pieces for assembly verification; the minimum order quantity is 5,000 pieces. For the cold heading process of non-standard parts, special mold opening is required, and the minimum order quantity can be negotiated.

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