Thick Nuts
Product: thick nuts
Standard: EN14399-4
Material: SWRCH45K, 42CrMo/40Cr etc.
Surface: Plain,black oxide etc.
Specification Range: M12-M36
Property Class: 10
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Product Introduction
Product: thick nuts
Standard: EN14399-4
Material: SWRCH45K, 42CrMo/40Cr etc.
Surface: Plain,black oxide etc.
Specification Range: M12-M36
Property Class: 10
Mechanical Properties
Core Function and Application
High-Strength Preloading and Load Proof Performance for Grade 10, compatible with Grade 10.9 bolts, meeting preloading force requirements of ≥0.7fᵤᵦ・Aₛ, used for friction-type and bearing-type steel structure connections. Achieves connectility through thread plastic deformation, enhancing fatigue and vibration resistance. Precise Torque-Preload Matching Cooperates with the HV system to achieve stable torque-preload correspondence, ensuringnsistency in on-site installation. Height of approximately 0.8d (d being the nominal diameter), compatible with short-threaded bolts, optimizing stress distribution. Reliability Assurance for Structural Connections Large wrench flat design facilitates high-torque installation; thread accuracy 6H/6AZ ensures tight fit and stable anti-loosening. Compatible with EN14399-5/6 washers, reducing stress concentration and improving connection durability.
Main Industry Application Scenarios
Building Steel Structures:
Connection nodes for main structures such as super high-rise buildings, factories, stadiums, trusses, and space frames.
Bridge Engineering:
Highway/railway bridges, steel box girders, steel tr connections between piers and bearings.
Wind Energy:
Connections for heavy-load and high-vibration areas such as tower sections, nacelles, and blade flanges.
Rail T:
High-speed rail/subway track beams, station steel structures, and vehicle bogie connections.
Heavy Machinery / Industrial Equipment:
Critical connections for mining machinery, port machinery, metallurgical equipment and pressure vessels.
Others:
Structures under harsh conditions such as transmission towers, offshore platforms, and nuclear power facilities.
Core Features
Mechanical Properties
Strength Grade: Grade 10 (per EN ISO 898-2), guaranteed load ≥1000MPa.
Thread Specifications: M1–M36, ISO 261 standard, tolerance 6H/6AZ. Structural Design: Hexagonal large wrench flat, height ≈0.8d, compatible with HV system short-threaded bolts.
Materials and Processes
Material: Medium carbon / alloy structural steel, quenched and tempered to ensure strength and toughness.
Surface Treatment: Commonly hot-galvanized (HDG), Dacromet, black, Geomet, etc., meeting corrosion protection and installation lubrication requirements.
Marking: Engrave"10 HV", traceable, compliant with CE and EN10204 certification requirements.
Engineering Adaptability Preload Compatibility: Specifically designed for them, forming a complete connection assembly with Grade 10.9 bolts and dedicated washers.
Installation Adaptability: Large wrench flat compatible with heavy-duty wrenches, suitable for -site high-torque construction. Environmental.
Adaptability: Corrosion-resistant coatings suitable for various conditions including indoor/outdoor, marine, and industrial corrosion.
Established in 2005, our company has evolved over two decades of continuous development into a leading regional enterprise in the fastener industry with fully automated end-to-end production. With an annual output value exceeding RMB 130 million, our product range covers diverse market segments from mid-range to high-end and is distributed worldwide
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