Corrosion Resistant Precision Machined Special Shaped Bolts

Product introduction

This plum blossom pan head composite groove bolt belongs to non-standard fasteners and special-shaped fasteners, and is also a typical non-standard screw. We can develop customized non-standard fasteners, customized special-shaped fasteners and customized special-shaped screws on demand, which can be used as precision automotive parts fasteners. The product adopts a composite plum blossom cross recess and a multi-layer stepped flower flange integrated structure, which is different from the conventional standard screws on the market. Relying on the cold heading precision molding process, the size, head shape, groove type, and thread length can be adjusted as needed. It supports a variety of carbon steel and stainless steel base materials and various galvanized anti-corrosion surface treatments, and is suitable for assembly scenarios of mechanical equipment, automotive components, and electrical equipment. Support drawings, sample proofing and mass production, strictly control tolerances, meet foreign trade environmental testing requirements, and provide reliable special-shaped fastening solutions for all walks of life.

 

Product design and features

Classified as non-standard fasteners, special-shaped fasteners, and non-standard screws, the head adopts a plum flange lace + cross composite groove structure, which is anti-loosening and anti-slip, and is suitable for special assembly tools;

The integrated stepped flange structure has its own pressure-bearing surface, eliminating the need for additional gaskets and making assembly more efficient;

Supports structural revision and can create customized special-shaped screws, customized special-shaped fasteners, and customized non-standard fasteners;

The thread precision is stable, the force is uniform, and the seismic resistance is excellent. It is widely used as fasteners for automobile parts;

The head shape, thread specifications, length, and surface coating can all be adjusted to flexibly adapt to different equipment assembly spaces.

 

Materials and application fields

Material:

The mainstream uses medium and low carbon steel, which can be electro-galvanized, hot-dip galvanized, or trivalent color zinc; it can also be replaced with 304/316 stainless steel as needed, and the anti-rust grade is optional.

Application areas:

Automobile chassis, interior decoration, electronic control components, as auto parts fasteners;

Construction machinery, home appliances, electrical control cabinets, new energy equipment assembly;

Automated equipment and equipment require non-standard screws, special-shaped fasteners, and connection parts of non-standard fasteners;

We can undertake the development and production of various types of customized non-standard fasteners, customized special-shaped fasteners, and customized special-shaped screws.

 

Quality control and certification system

Spectral testing of raw materials is carried out to control the purity of steel materials and ensure the basic performance of non-standard fasteners from the source;

Inspect the entire process of cold heading, thread rolling and electroplating, and strictly control the head forming and thread tolerances of special-shaped fasteners;

The finished products undergo torque testing, salt spray testing, and appearance screening to eliminate cracks, burrs, and defective threads;

Supports the issuance of RoHS and REACH environmental testing reports, adapting to the export of overseas Google foreign trade orders;

Establish a batch sample retention system, and all customized special-shaped screws, customized non-standard fasteners, and auto parts fasteners can be traced back to production records;

Continuously optimize the process and stabilize the production and delivery of large quantities of non-standard screws.

 

Customized services

Our factory is deeply involved in fastener customization and specializes in: customized non-standard fasteners, customized special-shaped fasteners, customized special-shaped screws, non-standard screws, and the development of special-shaped fasteners.

Receive customers’ CAD drawings and physical samples, conduct reverse surveying, and create molds;

Freely adjust the head style, groove type, thread specifications, length, and surface anti-corrosion treatment;

It can produce non-standard fasteners with flange plum blossom composite grooves as shown in the figure, adapting to the matching needs of automotive parts fasteners;

Support small batch sample trial production and mass production after confirmation;

Provide structural optimization suggestions to reduce special-shaped fastener processing costs.

 

FAQ

Q: Can you customize the special-shaped flange screws in the picture?

A: Absolutely. We specialize in the production of customized non-standard fasteners, customized special-shaped fasteners, and customized special-shaped screws. We can produce all kinds of non-standard screws and special-shaped fasteners.

 

Q: Is this screw suitable for use on cars?

A: Yes, this style is often used as a fastener for automobile parts. The material and salt spray anti-corrosion coating can also be adjusted according to the vehicle working conditions.

 

Q: Can the surface treatment only be galvanized?

A: Not only galvanizing, but also blackening, Dacromet, stainless steel passivation and other solutions can be provided on demand to adapt to special-shaped fasteners under different working conditions.

 

Q: Can it be customized without drawings and only samples?

A: Support sample mapping and modeling, develop corresponding non-standard fasteners and non-standard screws, issue processing drawings for confirmation and then open molds for production.

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