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Wuxi Hex Socket Head Bolt
QS Fastener: Wuxi Hex Socket Head Bolt
Product: Wuxi Hex Socket Head Bolt
Standard: ASME B18.3/GB 70.1
Coating: Hot Dip Galvanized (HDG)
Dimension: 3/4 IN
Length: 80 mm
Material: ASTM A320 Gr. L7M
Thread: 10 UNC
Thread Class: 2A
Standard: ASME B18.3/GB 70.1
Coating: Hot Dip Galvanized (HDG)
Dimension: 3/4 IN
Length: 80 mm
Material: ASTM A320 Gr. L7M
Thread: 10 UNC
Thread Class: 2A
Quantity
The Wuxi Hex Socket Head Bolt is a high-performance fastening solution engineered for demanding industrial applications requiring exceptional strength, corrosion resistance, and low-temperature toughness. Manufactured from ASTM A320 Grade L7M alloy steel, this bolt combines robust mechanical properties with specialized durability for critical service environments.
Material Excellence – ASTM A320 Gr. L7M
ASTM A320 Gr. L7M is a quenched and tempered alloy steel bolting material specifically designed for low-temperature service down to -100°C (-148°F). Unlike standard ASTM A193 B7 bolts which have a minimum service temperature of -29°C, Grade L7M undergoes Charpy V-notch impact testing to ensure adequate toughness in cold conditions. With a minimum yield strength of 80 ksi and tensile strength of 100 ksi, this grade delivers reliable performance while featuring restricted hardness (22 HRC maximum) for improved resistance to hydrogen embrittlement in sour service environments. These characteristics make it the preferred choice for oil and gas facilities, chemical plants, and cryogenic applications.
ASTM A320 Gr. L7M is a quenched and tempered alloy steel bolting material specifically designed for low-temperature service down to -100°C (-148°F). Unlike standard ASTM A193 B7 bolts which have a minimum service temperature of -29°C, Grade L7M undergoes Charpy V-notch impact testing to ensure adequate toughness in cold conditions. With a minimum yield strength of 80 ksi and tensile strength of 100 ksi, this grade delivers reliable performance while featuring restricted hardness (22 HRC maximum) for improved resistance to hydrogen embrittlement in sour service environments. These characteristics make it the preferred choice for oil and gas facilities, chemical plants, and cryogenic applications.
Dimensional Precision & Standards Compliance
This Hex Socket Head Bolt conforms to ASME B18.3 and GB/T 70.1 standards, ensuring interchangeability with international fastening systems. The cylindrical head with internal hex drive allows efficient torque transmission and installation in confined spaces where conventional hex head bolts cannot be easily accessed.
This Hex Socket Head Bolt conforms to ASME B18.3 and GB/T 70.1 standards, ensuring interchangeability with international fastening systems. The cylindrical head with internal hex drive allows efficient torque transmission and installation in confined spaces where conventional hex head bolts cannot be easily accessed.
Enhanced Corrosion Protection – Hot Dip Galvanized (HDG)
The Hot Dip Galvanized (HDG) coating provides superior corrosion resistance, significantly extending service life in outdoor and harsh environments. This zinc coating forms a metallurgical bond with the steel substrate, offering both barrier protection and cathodic protection against rust and corrosion. While HDG is highly effective for general corrosion resistance, users in high-stress or hydrogen-rich environments should consider that galvanized high-strength fasteners may require additional precautions regarding hydrogen embrittlement risk.
The Hot Dip Galvanized (HDG) coating provides superior corrosion resistance, significantly extending service life in outdoor and harsh environments. This zinc coating forms a metallurgical bond with the steel substrate, offering both barrier protection and cathodic protection against rust and corrosion. While HDG is highly effective for general corrosion resistance, users in high-stress or hydrogen-rich environments should consider that galvanized high-strength fasteners may require additional precautions regarding hydrogen embrittlement risk.
Applications
The Wuxi Hex Socket Head Bolt is ideally suited for:
- Low-temperature piping systems and pressure vessels in petrochemical plants
- Cryogenic storage tanks and LNG facilities
- Heavy machinery and industrial equipment assembly
- Outdoor infrastructure requiring long-term corrosion protection
- Marine environments where saltwater exposure demands superior corrosion resistance
- Power generation facilities and mining equipment
The Wuxi Hex Socket Head Bolt is ideally suited for:
- Low-temperature piping systems and pressure vessels in petrochemical plants
- Cryogenic storage tanks and LNG facilities
- Heavy machinery and industrial equipment assembly
- Outdoor infrastructure requiring long-term corrosion protection
- Marine environments where saltwater exposure demands superior corrosion resistance
- Power generation facilities and mining equipment
Quality Assurance
Every fastener undergoes rigorous quality control, with individual hardness testing as required by ASTM A320 L7M specifications. Matching nuts should conform to ASTM A194 Grade 7M for optimal performance.
Every fastener undergoes rigorous quality control, with individual hardness testing as required by ASTM A320 L7M specifications. Matching nuts should conform to ASTM A194 Grade 7M for optimal performance.
Choose Wuxi Hex Socket Head Bolt for reliable, high-strength fastening in the most challenging industrial applications.
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