316 Stainless Steel Non-Standard Round Head Bolts

Product introduction

We specialize in providing stainless steel non-standard round head bolts, using high-quality stainless steel screw materials such as SUS304 and SUS316L, which are both beautiful and corrosion-resistant. The round head design is smooth and has no edges and corners to avoid scratches. It is especially suitable for medical equipment, food machinery, electronic appliances and other fields.

 

As experts in non-standard screws, we are good at converting ordinary round heads into screws of various special shapes - cross recesses or internal hexagons can be added to the round heads, and the stem can be designed as a reduced stem, semi-threaded or with a through-hole structure. Whether it is head diameter, shaft length or thread specifications, we can provide non-standard customized screw services according to the drawings. Strict quality inspection, reliable performance, solving special assembly problems for you.

 

Product design and features

The core of stainless steel non-standard round head bolts lies in the perfect combination of "round head" and "non-standard". The round head design usually includes semi-round head, oblate head, high round head and other forms. It is characterized by a round and smooth head without sharp edges and corners. It not only has a beautiful appearance, but also avoids scratching the operator or the surface of the workpiece. It is especially suitable for occasions with high appearance requirements or frequent contact.

 

As special-shaped screws, our non-standard round head bolts have the following significant structural features:

Head diversification: The diameter, height and arc radius of the head can be customized according to needs, and cross grooves, internal hexagonal grooves or slots can even be added to the round head to meet different tool assembly needs.

Rod variability: Under the round head, the rod can be fully threaded, semi-threaded, or a reduced rod, a stepped rod or a non-standard screw structure with a through hole.

Functional combination: The functions of round head bolts, positioning pins and bushings can be combined into one, achieving multiple uses and simplifying the assembly structure.

We focus on transforming customers' creative drawings into physical objects. Each non-standard customized screw exists to solve specific assembly problems.

 

Materials and application fields

The material advantages of stainless steel screws provide non-standard round head bolts with excellent corrosion resistance and mechanical properties, allowing them to maintain long-term and stable connections in a variety of harsh environments.

Commonly used materials:

SUS304: General-purpose stainless steel with excellent anti-rust performance, suitable for general industry, electronic appliances, furniture hardware and outdoor facilities.

SUS316L: High-end stainless steel, more resistant to acid, alkali and chloride ion corrosion, suitable for medical equipment, marine engineering, food machinery and chemical equipment.

SUS430: Stainless steel with certain magnetism, suitable for specific electronic and electrical components.

 

Typical application areas

Medical equipment: surgical instruments, testing equipment appearance parts, round head design for easy cleaning, no sanitary dead corners.

Food machinery: conveying equipment, mixing equipment, round head smooth surface to prevent material residue and bacterial growth.

Electronic and electrical appliances: precision instrument casings and control panels, beautiful and not scratchy.

Amusement equipment: children's facilities, fitness equipment, round head design ensures safe use.

Furniture decoration: high-end furniture and display cabinet production, taking into account both aesthetics and connection strength.

 

Quality control and certification system

In view of the uniqueness of non-standard screws, we have established an exclusive quality control system that is more stringent than standard parts to ensure that each batch of special-shaped screws is accurate and reliable:

Full process inspection: From raw material spectral analysis to confirm the material, to full inspection of the head size after molding, thread pass and stop gauge inspection, to salt spray test and mechanical property test of the finished product, every step is strictly controlled.

Key process control: In view of the folding and cracking problems that are prone to occur in the heads of round head bolts, we optimize the design of cold heading molds and conduct strict first-piece confirmation of machined products to ensure the consistency of mass production.

Qualification certification: The factory has passed ISO 9001 quality management system certification, and the products comply with the requirements of the RoHS environmental directive. All stainless steel non-standard round head bolts can provide material certification reports and shipping inspection reports, and the quality can be traced throughout the process.

 

Customized services

We provide a full range of one-stop non-standard customization services, transforming your special needs into precise non-standard custom screw solutions.

Customization range:

Head shape: semi-round head, flat round head, high round head, mushroom head, and round head with cross recess, inner hexagon, one-shaped, plum blossom groove and other composite heads.

Rod features: full thread, half thread, reduced rod, double-ended thread, intermediate polished rod, radial through hole, axial through hole, knurled embossing and other special-shaped screw structures.

Thread specifications: metric (M2-M48), inch, American and fine threads, non-standard pitch can be customized.

Length and diameter: Precisely processed according to the drawing, the length can reach more than 1000mm, and the diameter covers micro to large and heavy-duty specifications.

Surface treatment: Passivation, electrolytic polishing, Dacromet and other special treatments can be provided according to needs.

Service support: Support customization of drawings, customization of samples, and reverse surveying and mapping. The minimum order quantity is flexible, ranging from a few R&D prototypes to mass production of tens of thousands.

 

FAQ

Q: What are non-standard round head bolts? Why choose non-standard customization?

A: Non-standard round head bolts refer to screws with special shapes that do not comply with the national standard (GB) or international standard (ISO) size series. Choosing non-standard customization is usually because the head diameter, height, rod length or special structure of standard parts cannot meet the specific space constraints or functional requirements of your equipment. Our non-standard custom screw service is designed to make the bolts perfectly fit your products, rather than letting your products adapt to standard parts.

 

Q: Is the head of the round head bolt strong enough? Will it cause twisting?

A: The strength of the head depends on the material, heat treatment (if necessary) and the design of the R angle at the connection between the head and the stem. As an experienced non-standard screw manufacturer, we will fully consider the stress situation when designing, optimize the head transition structure, and avoid stress concentration. At the same time, based on the torque requirements, we will recommend the most suitable groove type (for example, the internal hexagon is more resistant to large torque than the cross groove) to ensure reliable assembly.

 

Q: What is the minimum order quantity for non-standard round head bolts? Is there any charge for proofing?

A: We are committed to serving the non-standard needs of all types of customers, and the minimum order quantity is very flexible. For R&D projects that need to verify the design, we support small batch or even few-piece sampling services. Specific proofing policies can be communicated based on the complexity of the drawings, and we are happy to cooperate with new product development.

 

Q: Can this stainless steel non-standard bolt be used in highly corrosive environments?

A: Yes. Our stainless steel screws have flexible material options. If your application environment involves seawater, strong acid and alkali, or high temperature and humidity, we strongly recommend using SUS316L material, which can be combined with passivation treatment to further improve its corrosion resistance and ensure long-term stable service in harsh environments.

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