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Bolt Nut China Sourcing Partner
QS Fastener: Bolt Nut China Sourcing Partner
Name: Bolt Nut China Sourcing Partner
Grade: BSL-2
Size: 1-1/8 Inch
Thread: 8 UNC
Type: Tap End Stud with Hex Nut
Standard: API 20E Bolting
Length: 160mm
Coating: Zinc and Bichromated Plated
Price: USD 4.99/ Kg
MOQ: 10kg
Customization: yes
Delivery time: 7-30 Day
Application: Used in The Construction and Repair of Pipelines for Oil, Gas, Water, or Other Substances
Grade: BSL-2
Size: 1-1/8 Inch
Thread: 8 UNC
Type: Tap End Stud with Hex Nut
Standard: API 20E Bolting
Length: 160mm
Coating: Zinc and Bichromated Plated
Price: USD 4.99/ Kg
MOQ: 10kg
Customization: yes
Delivery time: 7-30 Day
Application: Used in The Construction and Repair of Pipelines for Oil, Gas, Water, or Other Substances
Quantity
When it comes to pipeline integrity, the choice of fasteners is as critical as the pipe itself. As a senior fastener engineer, I emphasize that bolting connections must withstand extreme pressures, thermal cycling, and corrosive media—without compromising safety. This is why we present our Grade BSL-2, 1-1/8 Inch, Thread 8 UNC Tap End Stud with Hex Nut, manufactured strictly in accordance with API 20E bolting requirements. For engineers and procurement managers looking for a trusted Bolt Nut China Sourcing Partner, this product represents the ideal balance of certified quality, cost efficiency, and supply chain agility.
Precision Engineering and Specifications
This fastener features a nominal size of 1-1/8 inch and a coarse 8 UNC thread, which provides excellent load distribution and resistance to stripping during make-up. The tap-end stud design allows for blind-hole installation, while the accompanying heavy hex nut ensures consistent torque application. With a total length of 160mm, it offers sufficient engagement length for flanged connections, valve mountings, and pressure vessel attachments commonly found in midstream and downstream facilities. The BSL-2 grade rating signifies that the material has undergone rigorous hardness testing and impact verification, making it suitable for sour service environments where hydrogen-induced cracking (HIC) is a concern—a non-negotiable feature for oil and gas operators.
This fastener features a nominal size of 1-1/8 inch and a coarse 8 UNC thread, which provides excellent load distribution and resistance to stripping during make-up. The tap-end stud design allows for blind-hole installation, while the accompanying heavy hex nut ensures consistent torque application. With a total length of 160mm, it offers sufficient engagement length for flanged connections, valve mountings, and pressure vessel attachments commonly found in midstream and downstream facilities. The BSL-2 grade rating signifies that the material has undergone rigorous hardness testing and impact verification, making it suitable for sour service environments where hydrogen-induced cracking (HIC) is a concern—a non-negotiable feature for oil and gas operators.
Corrosion Protection and Durability
The dual-layer zinc and bichromated plating is not merely aesthetic; it delivers sacrificial anodic protection while the chromate conversion layer seals the surface, significantly enhancing resistance to salt spray, humidity, and chemical splashes. This coating system has proven its worth in offshore platforms, desert pipelines, and sub-arctic pumping stations, extending service life by reducing galvanic corrosion between dissimilar metals. Even after prolonged exposure, the fasteners maintain their thread profile, ensuring easy disassembly during maintenance turnarounds.
The dual-layer zinc and bichromated plating is not merely aesthetic; it delivers sacrificial anodic protection while the chromate conversion layer seals the surface, significantly enhancing resistance to salt spray, humidity, and chemical splashes. This coating system has proven its worth in offshore platforms, desert pipelines, and sub-arctic pumping stations, extending service life by reducing galvanic corrosion between dissimilar metals. Even after prolonged exposure, the fasteners maintain their thread profile, ensuring easy disassembly during maintenance turnarounds.
Application Scenarios
These studs are extensively used in the construction and repair of pipelines for oil, gas, water, and other substances—ranging from cross-country transmission lines to refinery interconnecting piping. Typical use cases include:
- Flange bolting on ANSI/ASME class 600 and above.
- Actuator mounting brackets and support clamps.
- Subsea manifold connectors (with additional coating for cathodic protection compatibility).
- Wellhead equipment and Christmas tree assemblies.
They are equally suitable for industrial water treatment plants and chemical transfer stations where leak-free joints are mandatory.
These studs are extensively used in the construction and repair of pipelines for oil, gas, water, and other substances—ranging from cross-country transmission lines to refinery interconnecting piping. Typical use cases include:
- Flange bolting on ANSI/ASME class 600 and above.
- Actuator mounting brackets and support clamps.
- Subsea manifold connectors (with additional coating for cathodic protection compatibility).
- Wellhead equipment and Christmas tree assemblies.
They are equally suitable for industrial water treatment plants and chemical transfer stations where leak-free joints are mandatory.
Customization and Supply Flexibility
We fully support customization—whether you need modified lengths, alternative thread fits, or special marking for traceability. Our MOQ is set at just 10kg, ideal for emergency repair stock or trial orders. Delivery lead times range from 7 to 30 days, depending on quantity and finishing requirements, which is remarkably fast for API 20E-certified products. As a dedicated Bolt Nut China Sourcing Partner, we maintain real-time inventory visibility and offer third-party inspection services (e.g., SGS, BV) upon request, ensuring you receive exactly what you specify.
We fully support customization—whether you need modified lengths, alternative thread fits, or special marking for traceability. Our MOQ is set at just 10kg, ideal for emergency repair stock or trial orders. Delivery lead times range from 7 to 30 days, depending on quantity and finishing requirements, which is remarkably fast for API 20E-certified products. As a dedicated Bolt Nut China Sourcing Partner, we maintain real-time inventory visibility and offer third-party inspection services (e.g., SGS, BV) upon request, ensuring you receive exactly what you specify.
Price and Value Proposition
At USD 4.99 per kilogram, this fastener offers a competitive total cost of ownership—considering its extended service intervals and reduced unplanned downtime. Compared to equivalent US or European brands, you achieve 30-40% savings without sacrificing metallurgical integrity, because we control the entire supply chain from raw material melting to final plating.
At USD 4.99 per kilogram, this fastener offers a competitive total cost of ownership—considering its extended service intervals and reduced unplanned downtime. Compared to equivalent US or European brands, you achieve 30-40% savings without sacrificing metallurgical integrity, because we control the entire supply chain from raw material melting to final plating.
Summary
In summary, the BSL-2, 1-1/8"-8UNC tap-end stud with hex nut is a field-proven, code-compliant solution for demanding pipeline applications. Its corrosion-resistant coating, precise threading, and robust mechanical properties make it a first-choice component for project engineers. By partnering with us, you gain not only a product but also technical support, batch traceability, and on-time delivery—hallmarks of a responsible Bolt Nut China Sourcing Partner. Secure your pipeline assets with fasteners that combine American-standard performance with Chinese manufacturing excellence.
In summary, the BSL-2, 1-1/8"-8UNC tap-end stud with hex nut is a field-proven, code-compliant solution for demanding pipeline applications. Its corrosion-resistant coating, precise threading, and robust mechanical properties make it a first-choice component for project engineers. By partnering with us, you gain not only a product but also technical support, batch traceability, and on-time delivery—hallmarks of a responsible Bolt Nut China Sourcing Partner. Secure your pipeline assets with fasteners that combine American-standard performance with Chinese manufacturing excellence.
FAQ
Q1: Can this BSL-2 stud be used in sour gas (H₂S) environments?
Yes. The BSL-2 grade per API 20E requires strict hardness control (≤22 HRC) and impact toughness, which reduces susceptibility to sulfide stress cracking (SSC). We recommend confirming the partial pressure of H₂S and applying additional anti-seize compound during installation.
Yes. The BSL-2 grade per API 20E requires strict hardness control (≤22 HRC) and impact toughness, which reduces susceptibility to sulfide stress cracking (SSC). We recommend confirming the partial pressure of H₂S and applying additional anti-seize compound during installation.
Q2: Is the zinc and bichromated coating compatible with stainless steel flanges?
Absolutely. The coating minimizes galvanic potential differences. However, for repeated wet-dry cycles, we suggest using a dielectric grease between the nut face and flange to prevent crevice corrosion.
Absolutely. The coating minimizes galvanic potential differences. However, for repeated wet-dry cycles, we suggest using a dielectric grease between the nut face and flange to prevent crevice corrosion.
Q3: How do I verify batch traceability for my project documentation?
Every heat number and coating batch is recorded in our system. You will receive a material test certificate (MTC) conforming to EN 10204 3.1 or 3.2, and we can arrange witness testing at our accredited lab upon order confirmation.
Every heat number and coating batch is recorded in our system. You will receive a material test certificate (MTC) conforming to EN 10204 3.1 or 3.2, and we can arrange witness testing at our accredited lab upon order confirmation.
Q4: What is the maximum tightening torque recommended for this 1-1/8"-8UNC stud?
For dry threads, we suggest 950–1050 ft-lbs (using torque-plus-turn method). For lubricated threads, reduce by 20%. Always calibrate your torque wrench and perform a bolt load check via hydraulic tensioning for critical flanges. We can supply our recommended torque chart upon request.
For dry threads, we suggest 950–1050 ft-lbs (using torque-plus-turn method). For lubricated threads, reduce by 20%. Always calibrate your torque wrench and perform a bolt load check via hydraulic tensioning for critical flanges. We can supply our recommended torque chart upon request.
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