High-Strength Bolt for Steel Structure (Grade 10.9)

Basic Info

The Torque-Control High-Strength Bolt is a specialized bolt set designed for friction-grip connections in steel structures.Property Class 10.9.Its unique feature is a splined end("twist-off nib").Installation uses a special electric wrench to tighten until the nib shears off,ensuring the bolt achieves a precise,constant predetermined tension(preload).It is a core fastener for critical load-bearing joints in steelwork.

Key attributes

Origin

China

Surface Finish

Hot-dip galvanized

Material

Alloy Structural Steel

Standard

GB/T 3632

Customer reviews

James O'Connor · Equipment Maintenance Director

"Our food processing production line requires frequent disassembly and cleaning. For five years, your company's A4-80 stainless steel socket head cap screws have shown no thread galling or corrosion failure in high-temperature, high-humidity environments. The excellent chloride ion corrosion resistance has extended our equipment maintenance cycle by 30%."

Sophie Clark · Equipment Maintenance Manager

For the upgrade of our beverage filling equipment, we needed A2-70 stainless steel bolts that meet hygiene standards. Your products not only come with complete material certificates but also feature smooth, burr-free heads and threads, effectively preventing hygiene dead corners. After multiple CIP (Cleaning-in-Place) cycles, the appearance remains as bright as new.

Arjun Patel · Chief Mechanical Engineer

We needed to replace special flange connection bolts for an old imported machine, which had non-standard dimensions and required controlled head weight. Your technical team responded quickly, providing a custom solution that fully met the dimensional and performance requirements while achieving weight reduction through optimized head design, solving our urgent technical challenge.

Product Description

Product Characteristics:

Key feature is(intuitive and reliable installation quality control)–sheared nib indicates(qualified)installation.Generates massive,stable preload;force is transferred between connected plates via friction(not bolt shear),resulting in high joint stiffness and excellent fatigue resistance.The set includes a heavy hex bolt,one high-strength nut,and one hardened washer to ensure system performance.

Product Specifications:

Conforms to ASTM A325(US)or GB/T 3632(Chinese)standards.Common diameters:M16,M20,M22,M24,M27,M30.Length refers to the plain shank length(excluding nib),calculated precisely based on total connected material thickness.The matching nut is Grade 10H,washer hardness HRC 35-45.

Product Applications:

Specifically used for on-site connection of critical load-bearing parts in building steel structures(factories,stadiums,skyscrapers),bridge steel box girders/trusses,heavy industrial equipment frames,power transmission towers,etc.It is a vital component ensuring the overall safety and stability of steel structures.

Basic Info

Key attributes

Customer reviews

Product Description

Product Characteristics:

Product Specifications:

Product Applications:

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