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Zhangzhou Stainless Steel Hex Bolt
QS Fastener: Zhangzhou Stainless Steel Hex Bolt
Product : Zhangzhou Stainless Steel Hex Bolt
Type: Partial Threaded
Pitch: 7 UNC
Size: 1-1/8 Inch
Material: ASTM A320 B8M
Total Length: 85 mm
Standard for Bolt: ASME B18.2.1
Type: Partial Threaded
Pitch: 7 UNC
Size: 1-1/8 Inch
Material: ASTM A320 B8M
Total Length: 85 mm
Standard for Bolt: ASME B18.2.1
Quantity
The Stainless Steel Hex Bolt offered by Zhangzhou is a high-performance industrial fastener engineered for demanding bolting applications where corrosion resistance, tensile strength, and long-term reliability are non-negotiable. This hex head bolt is precision-manufactured to stringent dimensional and material standards, making it a preferred choice for infrastructure projects, marine environments, chemical processing plants, and heavy equipment assembly. Every batch of our Stainless Steel Hex Bolt undergoes rigorous quality control to ensure consistent mechanical properties and thread conformity.
Material Advantages – ASTM A320 B8M
The choice of ASTM A320 B8M sets this Stainless Steel Hex Bolt apart from conventional 304-grade fasteners. B8M is a molybdenum-bearing austenitic stainless steel that delivers enhanced pitting and crevice corrosion resistance, particularly in chloride-rich environments such as coastal installations and wastewater treatment systems. This material also retains excellent impact toughness at both elevated and sub-zero temperatures, ensuring the hex head bolt performs reliably across a wide service temperature range. Furthermore, the B8M grade offers superior resistance to intergranular corrosion after welding or heat exposure, extending the maintenance interval for critical bolted joints.
Design Engineering – Partial Threaded Configuration
Unlike fully threaded bolts, this Stainless Steel Hex Bolt features a partial threaded shank, leaving a plain cylindrical section beneath the head. This design is intentional and functionally significant: the unthreaded portion acts as a shear plane with a larger effective cross-sectional area, substantially increasing the bolt's load-carrying capacity under lateral forces. For applications involving dynamic loads, vibration, or fluctuating tension, the partial threaded design of this hex head bolt minimizes stress concentration points and reduces the risk of fatigue failure. The 85 mm total length provides ample engagement depth while maintaining a compact profile for confined assembly spaces.
Unlike fully threaded bolts, this Stainless Steel Hex Bolt features a partial threaded shank, leaving a plain cylindrical section beneath the head. This design is intentional and functionally significant: the unthreaded portion acts as a shear plane with a larger effective cross-sectional area, substantially increasing the bolt's load-carrying capacity under lateral forces. For applications involving dynamic loads, vibration, or fluctuating tension, the partial threaded design of this hex head bolt minimizes stress concentration points and reduces the risk of fatigue failure. The 85 mm total length provides ample engagement depth while maintaining a compact profile for confined assembly spaces.
Thread Precision – 7 UNC Pitch
The 7 UNC thread pitch conforms to the Unified Coarse thread series, which is widely adopted for general-purpose fastening in North American industrial standards. Coarse threads like 7 UNC offer faster assembly, better resistance to cross-threading, and improved performance in softer or brittle mating materials. When paired with a compatible heavy hex nut and hardened washer, this Stainless Steel Hex Bolt delivers a secure, vibration-resistant clamp load that remains stable over years of service.
The 7 UNC thread pitch conforms to the Unified Coarse thread series, which is widely adopted for general-purpose fastening in North American industrial standards. Coarse threads like 7 UNC offer faster assembly, better resistance to cross-threading, and improved performance in softer or brittle mating materials. When paired with a compatible heavy hex nut and hardened washer, this Stainless Steel Hex Bolt delivers a secure, vibration-resistant clamp load that remains stable over years of service.
Application Recommendations
This Stainless Steel Hex Bolt is ideally suited for:
- Flange connections in petrochemical piping systems
- Structural steel joints in bridge and offshore platforms
- Pump and valve mounting bases
- Heavy machinery frame assembly
- Food processing equipment requiring sanitary surfaces
- Marine deck hardware and propeller shaft couplings
This Stainless Steel Hex Bolt is ideally suited for:
- Flange connections in petrochemical piping systems
- Structural steel joints in bridge and offshore platforms
- Pump and valve mounting bases
- Heavy machinery frame assembly
- Food processing equipment requiring sanitary surfaces
- Marine deck hardware and propeller shaft couplings
Quality Assurance and Compliance
Each batch of our Stainless Steel Hex Bolt is traceable from raw material melt to final packaging. Mechanical property verification includes proof load testing, hardness evaluation, and dimensional inspection per ASME B18.2.1. We also provide optional third-party inspection reports and material test certificates (MTC) upon request. Our Zhangzhou production line employs advanced cold-heading and thread-rolling technologies to achieve consistent grain flow and surface finish, reducing the risk of hydrogen embrittlement and stress corrosion cracking.
Each batch of our Stainless Steel Hex Bolt is traceable from raw material melt to final packaging. Mechanical property verification includes proof load testing, hardness evaluation, and dimensional inspection per ASME B18.2.1. We also provide optional third-party inspection reports and material test certificates (MTC) upon request. Our Zhangzhou production line employs advanced cold-heading and thread-rolling technologies to achieve consistent grain flow and surface finish, reducing the risk of hydrogen embrittlement and stress corrosion cracking.
Packaging and Logistics
To preserve thread integrity and surface quality, our Stainless Steel Hex Bolt is packaged in moisture-barrier cartons with anti-rust VCI paper, then securely palletized for export. Standard lead time is 15–20 working days, with expedited options available for urgent project schedules.
To preserve thread integrity and surface quality, our Stainless Steel Hex Bolt is packaged in moisture-barrier cartons with anti-rust VCI paper, then securely palletized for export. Standard lead time is 15–20 working days, with expedited options available for urgent project schedules.
Why Choose Our Stainless Steel Hex Bolt?
By combining premium B8M metallurgy, precision 7 UNC threading, a purpose-designed partial threaded shank, and strict adherence to ASME B18.2.1, this hex head bolt delivers a total fastening solution rather than just a commodity component. Whether you are specifying new equipment or replacing existing fasteners, our Stainless Steel Hex Bolt offers the durability, traceability, and engineering integrity that professional maintenance teams and design engineers demand.
By combining premium B8M metallurgy, precision 7 UNC threading, a purpose-designed partial threaded shank, and strict adherence to ASME B18.2.1, this hex head bolt delivers a total fastening solution rather than just a commodity component. Whether you are specifying new equipment or replacing existing fasteners, our Stainless Steel Hex Bolt offers the durability, traceability, and engineering integrity that professional maintenance teams and design engineers demand.
For customized lengths, special coatings, or alternative material grades, please contact our technical sales team. We are ready to support your bolting challenges with application-specific advice and rapid prototyping capabilities.
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