Superior Custom Bolt Precision Engineered CNC Machined Fasteners for Automotive Applications

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What Is a Custom Bolt?

A custom bolt is a specially designed fastener manufactured according to specific customer requirements, including size, thread type, material, strength grade, head design, and surface finish. Compared with standard bolts, a custom bolt provides better performance for applications requiring unique structures, high strength, corrosion resistance, or precise assembly.

Polestar Metal provides CNC machined custom bolt solutions for automotive, industrial equipment, aerospace, and mechanical applications. We support OEM production based on drawings, samples, and technical specifications.

Custom Bolt Materials:

Polestar manufactures high-performance fasteners using a wide range of materials:

Stainless Steel:

• 304, 316, 17-4PH stainless steel
• Excellent corrosion resistance and long service life

Carbon Steel & Alloy Steel:

• 1018, 1045, 4140, 4340 steel
• High strength and wear resistance for heavy-duty applications

Aluminum Alloy:

• 6061, 7075 aluminum
• Lightweight and corrosion resistant

Titanium Alloy:

• Grade 2 Titanium
• Grade 5 Titanium (Ti-6Al-4V)
• Superior strength-to-weight ratio

Special Alloys:

• Inconel
• Nickel A286
• Nimonic 80A
• Suitable for high-temperature environments

Surface Treatments:

To enhance corrosion resistance, hardness, and appearance, Polestar provides various finishing options:

• Zinc Plating
• Nickel Plating
• Chrome Plating
• Black Oxide Coating
• Passivation
• Anodizing
• Electroless Nickel Plating
• Heat Treatment

These surface treatments help improve product reliability in automotive and industrial environments.

Specifications:

Polestar supports customized fastener production with:

• Diameter: M2–M30 or customized sizes
• Length: Customized according to requirements
• Thread Types: Metric, UNC, UNF, and special threads
• Head Styles:
  • Hex Head
  • Socket Head
  • Button Head
  • Flange Head
  • Shoulder Head
• Drive Options:
  • Hex Socket
  • Torx
  • Phillips
  • Customized designs
• Machining tolerance: Up to ±0.005 mm

Manufacturing processes include CNC turning, CNC milling, thread machining, grinding, heat treatment, and surface finishing.

Applications:

Precision fasteners are widely used in:

Automotive Industry:

• Engine components
• Suspension systems
• Transmission assemblies
• EV battery structures

Aerospace Industry:

• Aircraft structures
• Lightweight fastening systems

Industrial Equipment:

• Automation machinery
• Mechanical assemblies
• Heavy-duty equipment

Energy & Electronics:

• Power equipment
• Precision enclosures

Polestar Case Study: Titanium Fasteners for Automotive Suspension System

A European automotive customer needed a lightweight and high-strength fastening solution for a racing vehicle suspension assembly.

Polestar developed a Grade 5 Titanium fastener using CNC machining technology. The project requirements included:

• Material: Ti-6Al-4V Titanium
• Application: Suspension system
• Requirement: Lightweight structure with high strength
• Tolerance: ±0.01 mm
• Surface treatment: Customized corrosion protection

Through optimized design and precision machining, Polestar reduced component weight while maintaining excellent mechanical performance. The final parts passed customer testing and were successfully integrated into the vehicle platform.

FAQ:

What is the difference between a custom bolt and a standard bolt?

A standard bolt follows common industry dimensions, while a custom bolt is manufactured according to specific requirements for size, material, thread, and performance.

Can Polestar produce bolts according to customer drawings?

Yes. We provide OEM manufacturing based on CAD files, drawings, samples, and technical specifications.

What materials can be used for customized fasteners?

Available materials include stainless steel, carbon steel, alloy steel, aluminum, titanium, Inconel, Nickel A286, and other special alloys.

Which industries use these products?

They are commonly applied in automotive, aerospace, machinery, energy systems, and precision equipment.

Can special threads be manufactured?

Yes. Metric, inch, fine pitch, coarse pitch, and custom thread designs are available.

What quality inspections are provided?

Polestar offers dimensional inspection, material certification, CMM inspection reports, and strict quality control procedures.