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B7 Stud Nut China Supplier
QS Fastener: B7 Stud Nut China Supplier
Name: B7 Stud Nut China Supplier
Type: Tap End Stud
Surface Process: Yellow Zn
Standard: API 20E BSL-2
Size: 3/4 Inch
Material: Bolt A193 B7/ Nut A194 2H
Price: USD 2.99 - 9.99/ Kg
MOQ: 10kg
Customization: yes
Delivery time: 7-30 Day
Type: Tap End Stud
Surface Process: Yellow Zn
Standard: API 20E BSL-2
Size: 3/4 Inch
Material: Bolt A193 B7/ Nut A194 2H
Price: USD 2.99 - 9.99/ Kg
MOQ: 10kg
Customization: yes
Delivery time: 7-30 Day
Quantity
When you need a fastening solution that holds tight under extreme pressure, temperature swings, and corrosive environments, the ASTM A193 B7 stud with A194 2H nuts is a proven choice. This tap‑end stud and nut set delivers a complete, ready‑to‑use assembly for critical bolting applications across the oil and gas, petrochemical, and power generation sectors.
The stud is manufactured from high‑strength A193 B7 alloy steel, while the matching nuts are produced from A194 2H material. This combination offers outstanding mechanical properties – tensile strength up to 125 ksi, good ductility, and resistance to both oxidation and general atmospheric corrosion. The 3/4‑inch diameter fits standard flanges, valves, and pressure vessel connections, making it a versatile drop‑in replacement for existing maintenance inventories.
A key design feature is the tap‑end stud configuration. One end is chamfered for easy starting, and the other is clearly marked for identification. This allows quicker make‑up and break‑out during installation, which is particularly valuable for rotating equipment, heat exchangers, and piping systems that require periodic inspection or adjustment.
To boost corrosion resistance in offshore, coastal, or chemically aggressive settings, the entire set receives a yellow zinc surface finish. This coating provides sacrificial protection, significantly extending service life while maintaining thread integrity even after repeated torque cycles. The plating also offers a bright, identifiable appearance that helps visual inspection during assembly.
All components are produced and tested in compliance with API 20E BSL‑2, ensuring strict control over material traceability, hardness, and dimensional accuracy. This standard is widely recognised in the upstream and midstream oil industry, giving engineers confidence that each stud and nut meets the performance requirements for bolted flange joints under internal pressure and external bending loads.
For procurement professionals seeking a reliable B7 Stud Nut China Supplier, we offer flexible customisation – from special lengths and thread configurations to alternative coatings and packaging. With a low MOQ of just 10 kg, competitive pricing (USD 2.99 – 9.99/kg), and lead times ranging from 7 to 30 days, we support both emergency turnarounds and scheduled plant overhauls. Whether you are retrofitting an ageing refinery unit or commissioning a new gas compression station, these studs and nuts provide the secure, leak‑free connections you depend on. Choose durability, standard compliance, and supply chain efficiency – choose our B7 stud nut assemblies for your most demanding applications.
FAQ
1. What is the difference between A193 B7 studs and A194 2H nuts?
A193 B7 is the specification for the stud material – a chromium‑molybdenum steel with high tensile strength. A194 2H is the specification for the nut material – a medium‑carbon steel that is heat‑treated to match the strength level of B7. They are designed to work together as a system, with the nut hardness slightly lower than the stud to prevent galling and ensure proper load transfer.
1. What is the difference between A193 B7 studs and A194 2H nuts?
A193 B7 is the specification for the stud material – a chromium‑molybdenum steel with high tensile strength. A194 2H is the specification for the nut material – a medium‑carbon steel that is heat‑treated to match the strength level of B7. They are designed to work together as a system, with the nut hardness slightly lower than the stud to prevent galling and ensure proper load transfer.
2. Are these studs suitable for sour service or hydrogen sulfide environments?
The API 20E BSL‑2 standard focuses on material quality and testing, but for sour service (NACE MR0175/ISO 15156), additional restrictions on hardness and heat treatment apply. Our standard B7/2H sets are not automatically rated for H₂S. However, we can supply modified versions or alternative materials upon request – please specify your service conditions when ordering.
The API 20E BSL‑2 standard focuses on material quality and testing, but for sour service (NACE MR0175/ISO 15156), additional restrictions on hardness and heat treatment apply. Our standard B7/2H sets are not automatically rated for H₂S. However, we can supply modified versions or alternative materials upon request – please specify your service conditions when ordering.
3. Can I order a size other than 3/4 inch or with a different surface finish?
Yes. While the listed specification is for a 3/4‑inch tap‑end stud with yellow zinc, we support full customisation – including diameters from ½″ to 2″, lengths, thread classes, and finishes such as hot‑dip galvanised, Xylan, or PTFE coating. Just provide your drawing or performance requirement.
Yes. While the listed specification is for a 3/4‑inch tap‑end stud with yellow zinc, we support full customisation – including diameters from ½″ to 2″, lengths, thread classes, and finishes such as hot‑dip galvanised, Xylan, or PTFE coating. Just provide your drawing or performance requirement.
4. How does the yellow zinc plating affect torque and friction?
Yellow zinc adds a thin, lubricious layer that typically reduces the friction coefficient compared to plain steel. This means you may need to adjust your torque values to achieve the correct clamp load. We recommend using a calibrated torque wrench and, where possible, performing a tension‑calibration test with the actual batch to ensure consistent joint integrity.
Yellow zinc adds a thin, lubricious layer that typically reduces the friction coefficient compared to plain steel. This means you may need to adjust your torque values to achieve the correct clamp load. We recommend using a calibrated torque wrench and, where possible, performing a tension‑calibration test with the actual batch to ensure consistent joint integrity.
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