Specifications of DIN6914 Heavy Hex Structural Bolts
Specification | Details |
Model No. | DIN6914 10.9 Grade HV Heavy Hex Structural Bolt |
Material | 35CrMo / 42CrMo Alloy Steel |
Type | Heavy Enlarged Hexagon Head |
Standard | DIN6914, ISO7412, EN14399-4 |
Grade | Class 10.9 High Tensile |
Finish Options | Plain, Black Oxide, Zinc Plated, H.D.G., Dacromet, Geomet etc |
Thread Length | Full Thread or Half Thread Customizable |
Connection Type | HV Friction Type Structural Connection Bolt Set |
Application | European Steel Structures, Industrial Buildings, Bridges, Railway, Tower Engineering, Heavy Machinery |
Certificate | ISO9001:2015, MTR Material Test Report |
Package Dimensions | 25kgs/Carton put to 900kgs/Pallet |
Origin | Ningbo, Zhejiang, China |
HS Code | 7318150000 |
Head mark | According to customer requirements |
Delivery Time | 30-45 working days |
What Are DIN6914 Heavy Hex Structural Bolts?
DIN6914 heavy hex structural bolts are heavy-duty metric fasteners with enlarged and thicker hex heads compared to standard hex bolts. Specially designed for European HV friction-type steel structure connections, they feature larger bearing area, higher load-bearing capacity and excellent fatigue resistance. After strict quenching and tempering heat treatment, these 10.9 grade high tensile bolts can withstand long-term static and dynamic heavy loads, serving as core connection components for large steel construction, bridge and heavy equipment projects in harsh working conditions.
Why Choose Our DIN6914 Heavy Hex Structural Bolts?
Unmatched Quality Assurance
We strictly implement ISO9001:2015 quality management system. Every production link including raw material spectrum analysis, heat treatment monitoring, dimensional inspection and mechanical performance testing is fully controlled. Zero defective products are delivered to ensure all bolts meet international DIN, EN and ISO standards and engineering acceptance requirements.
Global Reach
Equipped with a 15,000 square meters modern factory and a monthly production capacity of 2,000 tons, we are capable of handling orders of all sizes. Our DIN6914 structural bolts are widely trusted by clients from Europe, Australia, Russia, Southeast Asia, the Middle East and other global regions, providing stable supply for overseas engineering and trading enterprises.
Customization at Its Best
We fully understand the personalized demands of different engineering projects. Custom non-standard sizes, special anti-corrosion finishes, exclusive head marking and customized export packaging are all available to perfectly match your unique project requirements.
How Are DIN6914 Heavy Hex Bolts Manufactured?
Our standardized manufacturing process guarantees high precision and stable quality for every bolt:
Material Selection: Premium 35CrMo/42CrMo alloy steel is adopted with stable chemical composition to ensure excellent mechanical performance.
Forging: Bolts are hot forged integrally with compact internal grain structure, no cracks or defects, improving overall strength and fatigue resistance.
Threading: Threads are precisely machined to 6g metric tolerance for smooth assembly and reliable tight connection.
Heat Treatment: Professional quenching and tempering treatment is applied to stably achieve 10.9 grade high tensile mechanical properties.
Finishing: Multiple protective coatings including black oxide, zinc plating, HDG and Dacromet are available for enhanced corrosion resistance.
Quality Checks: Each batch is strictly tested for tensile strength, hardness, torque coefficient, dimensional accuracy and appearance, with official test reports provided.
Difference Between DIN6914 and ASTM A325/A490 Bolts
Standard & Thread System: DIN6914 is a metric European standard bolt for global metric projects; ASTM A325/A490 are imperial American standard bolts specially for North American infrastructure, with incompatible thread systems.
Material & Strength: DIN6914 adopts 10.9 grade alloy steel with stable high strength; A325 uses medium carbon steel while A490 adopts ultra-high strength alloy steel for extreme heavy-load scenarios.
Finish Limitation: DIN6914 10.9 bolts support professional hot-dip galvanizing with anti-hydrogen embrittlement treatment; A490 bolts are forbidden for HDG treatment due to hydrogen embrittlement risks.
Matching Accessories: DIN6914 is completely matched with DIN6915 nuts and DIN6916 washers; A325/A490 supports A563 nuts and F436 hardened washers, with two independent standard sets.
How to Choose the Right DIN6914 Heavy Hex Bolts?
Consider Load Requirements: Standard 10.9 grade DIN6914 bolts are suitable for conventional steel frame projects; customized enhanced specifications are recommended for long-span bridges and wind power projects with high dynamic loads.
Evaluate Environmental Conditions: Choose black finish for indoor dry environments; select HDG or Dacromet coating for outdoor, humid and coastal corrosive working conditions.
Match Standard Specifications: Adopt complete DIN/EN standard bolt sets for European steel structure projects to avoid safety risks caused by mixed standard accessories.
What Makes Our DIN6914 Bolts Unique?
We integrate advanced production technology, rigorous quality control system and customer-oriented service. Focusing on high-strength structural fasteners, we provide cost-effective, high-reliability DIN6914 bolt solutions for global customers, fully supporting the stable implementation of various industrial and infrastructure projects.
What Are the Applications of DIN6914 Heavy Hex Bolts?
DIN6914 10.9 grade heavy hex structural bolts are versatile for all high-strength friction connection scenarios:
Structural Steel Construction: Connection and fixation of beams and columns for factory buildings and high-rise steel structures.
Bridge Engineering: Load-bearing connection for highway and railway steel bridges.
Heavy Machinery: Frame fastening for mining, metallurgical and large industrial equipment.
Infrastructure Projects: Wind turbine towers, power transmission towers, municipal steel structures and railway facilities.
Looking for standard or customized DIN6914 10.9 grade heavy hex structural bolts for your project? Our professional team provides professional selection guidance, accurate quotation and complete technical support for all structural fastener demands.
Sales Office: ROOM1-3, No.34 Building 5, Eastern Business Centre, Jiangdong District, Ningbo, China
Factory Location: Yuyan, Xiepu Chemical Industrial Zone, Zhenhai District, Ningbo, China
Tel: +86-574-86595122
Fax: +86-574-86657066
Email: sales2@topboltmfg.com
Feel free to contact us for inquiries and orders. We support standard and non-standard customization, and sincerely look forward to cooperating with you!
