DIN 933 High Tensile Hex Bolt Grade 12.9 | Black Oxide Alloy Steel

Product Overview

The Grade 12.9 Hex Head Bolt is the highest strength class in standard metric fasteners. It is engineered for critical applications where high tensile strength and clamping force are required, such as automotive engines, heavy hydraulics, and structural steel frameworks.

Manufactured from premium Alloy Steel, these bolts undergo a precise Quenching and Tempering heat treatment process to achieve their superior mechanical properties.

Key Features:

Ultimate Strength: With a tensile strength of 1220 MPa, it is 50% stronger than standard Grade 8.8 bolts.

Precision Thread: Rolled threads for higher fatigue resistance and smooth installation.

Surface Treatment: Black Oxide finish provides mild corrosion resistance and a professional matte black appearance.

Technical Specifications:

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Detailed Product Gallery

Technical Drawing (DIN 933)

Manufacturing & Quality Control

Advanced Cold Heading Precision manufacturing.

Optical Sorting 0-PPM defects.

Lab Testing Tensile & Salt Spray.

Project References

Interior Decoration (USA) Hanging Heavy Fixtures

Ceiling System (Europe) Light Fixture Support

Automotive (Germany) High Strength Fasteners

Frequently Asked Questions

Q: Can I get free samples?

Yes! We provide free samples for standard fasteners. You only need to cover the shipping cost.

Q: What standards and MOQ do you support?

Mainly GB and ISO (compatible with DIN/ANSI). MOQ is flexible (500 kgs/1000 pcs) for standard items.

Q: What certifications do you have?

We are CE Certified. Every shipment comes with a Factory Quality Inspection Report.

Q: What is your delivery time?

Stock items: 3-7 days. Mass production: 20-30 days.

Q: Can you produce according to drawings?

Yes, OEM/ODM is our strength. Send us CAD drawings for a quote within 24 hours.

Q: What are your payment terms?

We generally accept T/T (30% deposit, 70% before shipment). For long-term partners, we can discuss L/C.