Cold heading Service

UNI5712 High-strength Large Hexagon Structural Bolt Manufacturer In China

Ningbo Teng Qi Fasteners is a professional manufacturer of UNI 5712 Italian standard large structural bolts, featuring high strength, stability and reliability, and are suitable for various large structural engineering projects.

Advanced manufacturing processes are adopted, including wire drawing, cold heading, hot forging, automatic thread rolling and heat treatment, to ensure that product quality reaches the optimal level. In addition, we also have a professional electroplating production line to provide corrosion-resistant surface protection for our products.

Equipped with advanced testing equipment, including tensile testing machines and metallographic analyzers, we strictly control every production link to ensure stable and reliable product quality. Through large-scale production, we are able to reduce costs and provide customers with competitive prices and high-quality products.

Black Oxidation UNI5712 Italy Standard Large Structural Bolt
UNI5588 Black Oxidation Hex Nuts


The specification of UNI5712 Italy Standard Large Structural Bolt include the following details:

Product nameUNI5712 Italy Standard Large Structural Bolt
Thread Diameter:M12-M48
Material:Steel: C45,40CR,35CRMO,42CRMO

Surface TreatmentZinc Plated/Plain/Black Oxidation/HDG/Dacromet
Packaging:Boxes/cartons into wooden pallets

Dimension Chart of UNI5712 Italy Standard Large Structural Bolt:

UNI5712 Italy Standard Large Structural Bolt Dimension Chart Drawing M12-M27

Thread DiameterM12M14M16M18M20M22M24M27
b max2325283033343739
b min2123262831323437
s max2224273032364146
s min21.1623.1626.1629.1631354045
da max15.
ds max12.714.716.718.720.8422.8424.8427.84
ds min11.313.315.317.319.1621.1623.1626.16
e min23.9127.3429.5634.2735.0339.5545.250.85
k max8.459.7510.7512.913.914.915.917.9
k min7.558.259.2511.
r min1.

Application of UNI5712 Italy Standard Large Structural Bolts:

UNI 5588 hex nuts find extensive applications in the following areas:

Steel Structures:They are commonly used in the construction of steel buildings, warehouses, and industrial facilities to connect structural members such as beams, columns, and braces.
Bridges:UNI 5712 bolts play a vital role in connecting bridge components such as girders, piers, and deck structures, ensuring stability and load transfer across the bridge.
Towers:In the construction of communication towers, electrical transmission towers, and wind turbine towers, these bolts are used to securely fasten the tower sections together, providing strength and stability.
Heavy Machinery:They are employed in assembling heavy machinery and equipment where high-strength connections are required to withstand dynamic loads and vibrations.