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Zhejiang Double Threaded Stud
QS Fastener: Zhejiang Double Threaded Stud
Product: Zhejiang Double Threaded Stud
Coating: Zinc Plated
Color: Yellow
Hardness: Max 34 HRC
Dimension: 1-3/8 IN
Total Length: 4.5 IN
Material: ASTM A193 B16
Thread: 8 UNC
Standard: API 20E BSL 1
Coating: Zinc Plated
Color: Yellow
Hardness: Max 34 HRC
Dimension: 1-3/8 IN
Total Length: 4.5 IN
Material: ASTM A193 B16
Thread: 8 UNC
Standard: API 20E BSL 1
Quantity
In high-pressure, high-temperature (HPHT) environments, fastener integrity is non-negotiable. Our Double Threaded Stud, manufactured in Zhejiang, is precision-engineered to deliver exceptional clamping force, thermal stability, and long-term corrosion resistance. This stud is not merely a connector; it is a critical component for mission-critical bolted connections in the energy and process industries.
Material & Mechanical Properties
Manufactured from ASTM A193 B16 chromium-molybdenum-vanadium steel, this stud is specifically designed for service at elevated temperatures up to 593°C (1100°F). Unlike standard B7 material, B16 offers superior creep resistance and reduced susceptibility to hydrogen embrittlement. The component is heat-treated to a maximum hardness of 34 HRC (Rockwell C), striking an optimal balance between high tensile strength and ductility—minimizing the risk of stress corrosion cracking (SCC) while maintaining structural toughness under cyclic loading.
Manufactured from ASTM A193 B16 chromium-molybdenum-vanadium steel, this stud is specifically designed for service at elevated temperatures up to 593°C (1100°F). Unlike standard B7 material, B16 offers superior creep resistance and reduced susceptibility to hydrogen embrittlement. The component is heat-treated to a maximum hardness of 34 HRC (Rockwell C), striking an optimal balance between high tensile strength and ductility—minimizing the risk of stress corrosion cracking (SCC) while maintaining structural toughness under cyclic loading.
Dimensions & Thread Configuration
The stud measures 4.5 inches in total length with a nominal diameter of 1-3/8 inches. It features 8 UNC (Unified Coarse) threads per inch on both ends. This coarse thread profile is deliberately selected for heavy-duty applications, offering deeper thread engagement, faster assembly, and superior load-bearing capacity compared to fine threads, particularly in field conditions where minor surface contaminants may be present.
The stud measures 4.5 inches in total length with a nominal diameter of 1-3/8 inches. It features 8 UNC (Unified Coarse) threads per inch on both ends. This coarse thread profile is deliberately selected for heavy-duty applications, offering deeper thread engagement, faster assembly, and superior load-bearing capacity compared to fine threads, particularly in field conditions where minor surface contaminants may be present.
Corrosion Protection & Coating
To combat atmospheric and chemical corrosion, the stud is coated with Electric Zinc plating, resulting in a distinctive Yellow iridescent finish (yellow chromate conversion). This electroplated layer provides sacrificial anodic protection, significantly extending service life in moderately corrosive environments while offering consistent torque-tension characteristics during hydraulic tensioning or torque wrenching.
To combat atmospheric and chemical corrosion, the stud is coated with Electric Zinc plating, resulting in a distinctive Yellow iridescent finish (yellow chromate conversion). This electroplated layer provides sacrificial anodic protection, significantly extending service life in moderately corrosive environments while offering consistent torque-tension characteristics during hydraulic tensioning or torque wrenching.
Quality Assurance & Standards
Critically, this Double Threaded Stud is fully compliant with API 20E BSL 1 (American Petroleum Institute – Bolting Specification Level 1). This mandates strict material traceability, chemical analysis, and hardness testing, ensuring 100% conformity to global oil and gas quality benchmarks.
Critically, this Double Threaded Stud is fully compliant with API 20E BSL 1 (American Petroleum Institute – Bolting Specification Level 1). This mandates strict material traceability, chemical analysis, and hardness testing, ensuring 100% conformity to global oil and gas quality benchmarks.
Typical Application Scenarios
This stud is the preferred choice for:
- Flange connections in refinery piping systems and pressure vessels.
- Valve bonnet bolting in upstream and midstream oil & gas operations.
- Heat exchanger shell flanges and turbine casing assemblies.
- Structural anchors in offshore platforms and petrochemical plants where elevated temperatures are routine.
This stud is the preferred choice for:
- Flange connections in refinery piping systems and pressure vessels.
- Valve bonnet bolting in upstream and midstream oil & gas operations.
- Heat exchanger shell flanges and turbine casing assemblies.
- Structural anchors in offshore platforms and petrochemical plants where elevated temperatures are routine.
Choose our Double Threaded Stud for guaranteed clamping force, regulatory compliance, and operational safety in your most demanding bolting applications. Available for global export with full mill test reports (MTRs) upon request.
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