Flanged Hex Bolts

In accordance with the DIN6921 standard, LINHUI Titanium manufactures precisely made Flanged Hex Bolts in sizes M4 to M12 and lengths ranging from 8mm to 150mm. Our bolts are renowned for their stringent tolerance control of ±0.01mm to ±0.05mm, which guarantees reliable performance under difficult conditions.

These Hex Bolts offer remarkable high strength, outstanding corrosion resistance, and dependable heat resistance because of a variety of surface treatments, including Zinc Plated, Plain, and Black Oxide finishes. By properly spreading the clamping strain to increase vibration resistance and avoid substrate damage, the integrated flange design does away with the need for separate washers. To ensure it meets international standards, each fastener is manufactured using ISO 9001:2015 certified methods and goes through a thorough quality assessment.

Key Features & Benefits

Compared to traditional hex bolts, the integrated flange offers 30% greater bearing area and functions as an integrated load spreader. Even in the presence of high-frequency vibrations, its design prevents surface deformation and guarantees solid attachment.

Our Hex Bolts maintain their structural integrity even at temperatures as high as 400°C. The precise hexagonal head minimizes tool wear and installation time while guaranteeing high torque transmission without cam-out.

Multiple surface treatments prolong service life in harsh industrial environments by reducing oxidation and environmental degradation.

Product Information

Chemical Composition

Our bolts are composed of Grade 8.8 and 10.9 alloy steel for common applications and 316L stainless steel for corrosive environments.

Grade 8.8: manganese 0.60–0.90%, carbon 0.25–0.55%, and tensile strength 800 MPa. Grade 10.9: 1000 MPa tensile strength with chromium additions and an increased carbon percentage of 0.25–0.55%.

For improved chloride resistance in chemical and marine processing, we provide 316L variants with 16–18% chromium, 10–14% nickel, and 2-3% molybdenum.

Manufacturing Process

Raw material undergoes hot forging to shape hexagonal heads with integrated flanges, followed by thread rolling for superior fatigue resistance compared to cut threads. This cold-working process increases surface hardness by 15-20%.

Heat treatment cycles are precisely controlled based on grade requirements. Grade 8.8 bolts undergo quenching at 850°C and tempering at 400°C. Surface treatments are applied post-heat treatment, with zinc plating thickness reaching 5-8μm for optimal corrosion protection.

Final inspection includes dimensional verification, torque testing, and metallographic analysis to ensure compliance with DIN6921 specifications.

Quality Inspection

Every production batch undergoes 100% dimensional inspection using CMM equipment with ±0.005mm accuracy. Thread gauges verify GO/NO-GO parameters per ISO 1502 standards.

Mechanical testing includes tensile strength verification, proof load testing, and hardness measurement using Rockwell scales. Salt spray testing validates corrosion resistance, with zinc-plated variants exceeding 96 hours without red rust formation.

We provide EN 10204 3.1 material certificates with complete traceability via heat number documentation. Third-party inspection by SGS, BV, or TÜV is available upon request.

Applications Of Flanged Hex Bolts

Flanged Hex Bolts are widely used in automotive assembly for chassis mounting and suspension systems where weight distribution is critical. The flange design prevents loosening under vibration, making them ideal for engine mounts and transmission housings.

In construction machinery, these fasteners secure hydraulic components and structural frames. HVAC systems utilize them for compressor mounting and ductwork assembly. Electronics manufacturing employs them for equipment chassis and panel mounting.

Marine applications benefit from stainless steel variants in deck hardware and machinery installation where salt exposure demands superior corrosion protection.

Export Markets

Hex bolts are exported by LINHUI Titanium to more than 60 nations in Southeast Asia, Europe, and North America. The United States, Germany, Canada, Japan, and the United Arab Emirates are important markets.

We have solid relationships with global manufacturers of industrial machinery, construction equipment, and automobile OEMs. ASTM, DIN, and ISO international standards are met by our goods.

For your projects, regional warehouses in important markets guarantee prompt delivery and local technical assistance.

Company Profile

LINKUN TITANIUM was founded in 2000, headquartered in Xi’an, China, the hometown of our President Mr. Xi Jinping, and the starting point of the new and old “Belt and Road”, as a leading Manufacturer and Supplier of Flanged Hex Bolts and Titanium Alloys, LINKUN TITANIUM has been insisting on creating value for customers, always adhering to the development strategy of “supplying high-end products, establishing world-renowned enterprise” to provide global customers with superior quality products and high-quality services. Through the resource integration of a variety of metal materials, LINKUN TITANIUM has become one of the biggest TITANIUM PRODUCTS SUPERMARKETS and can provide lots of quality grades to our customers

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Why Choose Us

By cutting out intermediaries, direct mill supply offers you factory-direct pricing and assured quality control. For normal standards, our 200+ tons of stock inventory allows for delivery in three to seven days.

Flexible MOQ is perfect for small-batch production and prototyping, supporting trial orders as low as 100 kg. For material selection and application-specific solutions, our engineering staff offers technical advice.

With ISO 9001:2015 certification and 24 years of manufacturing experience, we provide continuous quality supported by complete traceability documentation. Throughout your project, seamless communication is ensured by multilingual support in Spanish, Chinese, and English.

Packaging & Shipping

Standard packing comprises plastic bags plus carton boxes, with moisture-proof paper for marine freight. For large orders weighing more than 500 kg, export-grade hardwood cases are offered.

Specifications, quantity, heat number, and handling directions are all labeled on each box. Stretch wrapping and steel strapping are used to secure palletized shipments.

Depending on your needs, we set up FOB, CIF, or DDP terms. For urgent samples, expedited shipment by FedEx or DHL delivers within five to seven days worldwide.

FAQ

Q:Which torque specifications ought to be applied?

A: Bolt size and grade affect torque values. M8 Grade 8.8 normally requires 25 Nm, whereas M10 requires 50 Nm. Every order comes with comprehensive torque charts.

Q:Is it possible for you to provide bespoke lengths?

A: For orders over 1000 pieces, we can provide custom lengths ranging from 10mm to 200mm with a lead time of 15–25 days.

Q:How may thread galling be avoided during installation?

A: Before assembling, lubricate or apply anti-seize compound to the threads, particularly for stainless steel versions. In addition to preventing cold welding, this lowers friction.

Q:Are you able to use your bolts outside?

A: Zinc-plated models provide outdoor protection for one to two years. We suggest hot-dip galvanized or stainless steel choices with improved corrosion resistance for prolonged exposure.

Q: Do you offer material certificates?

A: Each shipment has EN 10204 3.1 certificates with complete chemical composition and mechanical test findings.

Request a Quote

Are you ready to find a reliable fastening solution using Flanged Hex Bolts? Contact our technical team at linhui@lhtitanium.com for customized quotations, technical drawings review, and material recommendations. We respond within 4 hours to support your project timeline efficiently.