ASTM A193 B7 Full Thread Stud Bolt M12 x 305~400mm with 2H Heavy Hex Nuts(copy)

Engineering Specifications:

High-Tensile All-Thread Stud Bolts (Grade B7) pairing with Grade 2H Heavy Hex Nuts represent an international engineering standard for fastening solutions. Specifically engineered for critical environments, this assembly withstands extreme tensile loads, high pressures, and operating temperatures well beyond the threshold of conventional steel fasteners.

Engineering Properties:

• Material: Alloy Steel (AISI 4140/4142) subjected to Quenching and Tempering heat treatment
  
• Temperature Resistance: Performs effectively within continuous operating temperatures from -29°C to 450°C (-20°F to 840°F) without structural degradation
  
• Tensile Strength: Minimum 125,000 psi (approx. 860 MPa)
  
• Yield Strength: Minimum 105,000 psi (approx. 720 MPa)

• Matched Mechanical Load Capacity: While ASTM A193 Grade B7 specifies the stud rod properties, ASTM A194 Grade 2H dictates the heat-treated Heavy Hex Nut standards. This prevents thread stripping or deformation under high torque loading during flange joint tightening.
• Leak Prevention Under High Pressure: Dual-nut all-thread tensioning ensures uniform clamping force across flange faces and gaskets, significantly mitigating gas, chemical, or steam leakage risks.
• Superior Stress Distribution: The headless all-thread construction eliminates stress concentration points at the bolt neck, offering enhanced fatigue resistance under vibration and thermal expansion cycles.

• Piping & Flange Connections: Refineries, petrochemical plants, and power generation facilities
• Pressure Vessels & Steam Valves: High-pressure tank covers, boilers, and industrial control valves
• Heavy Machinery & Offshore Platforms: Critical structural joints subjected to continuous mechanical stress and severe operating conditions
• Register & Formality: Technical/Engineering documentation style suitable for product catalogs, spec sheets, or B2B export listings.
• Standard Representation: Maintained precise conversions for pressure/temperature standards (ASTM A193/A194) and mechanical strength equivalents (psi to MPa).