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Ningbo Teng Qi Fasteners Co., Ltd is a leading high strength bolts manufacturer in China. A high-strength bolt is a type of fastener designed to provide greater tensile strength and load-bearing capacity compared to standard bolts. These bolt are typically made from high-strength materials, such as alloy steel, and are manufactured with precise specifications to meet specific engineering requirements. They are commonly used in applications where structural integrity and durability are critical, such as in construction, bridges, automotive, and aerospace industries. High-strength bolt are often used in conjunction with nuts and washers to create secure and reliable connections in various structural and mechanical assemblies.

High strength bolts

Specification of High Strength Bolts:

The specifications for high-strength bolt can vary depending on the specific application and engineering requirements. However, there are some common characteristics and standards that are typically followed when specifying high-strength bolts. Here are some key specifications:

Product nameHigh Strength Bolts
DiameterMetric: M6-M100
Imperial:1/4" to 4"
LengthMetric: Up to 800mm
Imperial: Up to 30"
A2-70 A2-80 A4-70 A4-80
GradeSAE J429 GR.2/5/8
MaterialAlloy Steel/Stainless steel
Manufacturing Processwire drawing, cold heading/hot forging, thread rolling, heat treatment, surface treatment
Surface treatmentBlack Oxide Coating/Zinc Plating (Electroplating)/Hot-Dip Galvanizing/Mechanical Galvanizing/Dacromet Coating/Painting or Powder Coating
Application IndustryConstruction/Agricultural Machinery/Industrial Structures/Equipment and Machinery/Infrastructure

FAQ about High Strength Bolts:

1.How are high-strength bolt manufactured?

High-strength bolt are typically manufactured through processes like hot forging, machining, and heat treatment to achieve the desired mechanical properties.

2.Are torque specifications different for high-strength bolt?

Yes, torque specifications for high-strength bolts are typically different due to their higher tensile strength.

3.How are high-strength bolt different from regular bolt?

High-strength bolts are made from specialized materials and are manufactured with precise specifications to provide greater tensile strength and load-bearing capacity compared to regular bolts.

4.How are high-strength bolt tested for quality control?

High-strength bolt undergo various tests, including tensile testing, hardness testing, and dimensional checks, to ensure they meet the specified standards and requirements.