Non Standard Bolts

One rally car customer required fine threads with a large washer face. No standard bolt matched his needs. He sent us a sketch, and we designed the mold in three days. Samples were ready in one week, and all tests passed. Later, he entrusted us with all the bolts for his entire car.

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Product Introduction

Product Data Table

Parameter	Range
Standard	GB/T 3103.1-2012, GB/T 1184-2011
Key dimensions	Per drawing; non-standard pitch and head diameter; general tolerance ±0.08 mm
Strength	Grade 8.8 or 10.9; wedge load test passes
Shape tolerance	Shank straightness ≤0.05 mm, head perpendicularity ≤0.04 mm
Hardness	Grade 8.8: HRC 22–32; Grade 10.9: HRC 32–39

Made Exactly to Your Drawing

Non-standard bolts are not found in any catalog. Their thread size, head shape, or length is unique. You might need an inch thread with a metric head, a long thin shank, or a special flange. We make them exactly according to your drawing.

Our team is ready to handle your custom requirements. We can work with special materials, specialized heat treatment, and complex shapes.

Reliable Quality Checks

How do we ensure quality?

We control every stage, from raw material to finished bolt. Incoming materials are tested for hardness and size. Each production step undergoes patrol checks. Molds are replaced on schedule. Finished non standard bolts receive a full inspection.

Can we get a sample before mass production?

Yes. We provide pre-production samples for your approval before running bulk production. This minimizes risk.

What is your pre-sales service?

We review your needs, drawing, or sample, then provide process advice, specifications, pricing, and a sample plan. Material, strength, and finish are all discussed in advance.

After-Sales and Warranty

What about after-sales service?

One dedicated contact will assist you after delivery. Any issue receives a fast response, and we actively provide solutions.

How long is the warranty?

12 months. If a problem arises from our material or workmanship, we replace it free of charge. We have long-term partnerships with Great Wall, Geely, and Chery, so our non standard bolts are trusted.

We also perform metallurgical checks for quench cracks and decarburization. Coaxiality between head and shank is maintained within 0.03 mm, ensuring smooth assembly.

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