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B7M Bolt Chinese Factory
QS Fastener: B7M Bolt Chinese Factory
Name: B7M Bolt Chinese Factory
Size: 1-1/8 Inch
Length: 7-1/2 Inch
Material: ASTM A193 B7M
Part: With One Heavy Hex Nut
Anti-corrosion Coating: Zinc Nickel + Xylan 1070
Standard: API 20E BSL-3 Bolting
Price: USD 2.99 - 4.99/ Kg
MOQ: 10 kg
Customization: yes
Delivery time: 7-30 Day
Size: 1-1/8 Inch
Length: 7-1/2 Inch
Material: ASTM A193 B7M
Part: With One Heavy Hex Nut
Anti-corrosion Coating: Zinc Nickel + Xylan 1070
Standard: API 20E BSL-3 Bolting
Price: USD 2.99 - 4.99/ Kg
MOQ: 10 kg
Customization: yes
Delivery time: 7-30 Day
Quantity
As a senior fastener engineer, I specify B7M bolting for critical service environments where sulfide stress cracking (SSC) is a primary concern. This stud tap end bolt, sized at 1-1/8"x 7-1/2", is manufactured from double-tempered ASTM A193 B7M material, delivering the required hardness control (HRC 22 max) and enhanced ductility for H₂S-rich oilfield applications. Each unit ships with a matching heavy hex nut, ensuring full load transfer and reducing the risk of self-loosening under vibration.
The dual-layer anti-corrosion system—Zinc Nickel alloy plus Xylan 1070 topcoat—provides exceptional galvanic protection and low friction torque control, far outperforming standard zinc plating in salt spray and chemical exposure. This coating extends service life significantly, minimizing unplanned maintenance in offshore and petrochemical assets. The assembly fully complies with API 20E BSL-3, guaranteeing traceability, lot control, and mechanical property verification per the most stringent industry level.
For applications requiring elevated-temperature strength up to 650°C alongside excellent oxidation resistance, our Chinese factory also supplies A453 660 Bolt solutions, which are often specified for turbine casings and high-pressure steam lines. As a reliable Chinese supplier, we maintain strict in-house metallurgical testing, including hardness, tensile, and impact verification, ensuring every lot meets or exceeds standard requirements. We offer full customization—from thread length adjustments to special marking—with a flexible MOQ of just 10 kg and rapid lead times ranging from 7 to 30 days. Pricing between USD 2.99–4.99/kg reflects direct mill sourcing and process optimization, making this B7M stud a cost-effective, high-integrity choice for global energy projects. Investing in this bolting reduces lifecycle costs, enhances safety margins, and ensures regulatory compliance across all major international standards.
FAQ
1. Q: What is the maximum operating temperature for this B7M bolt with Xylan 1070 coating?
A: The B7M substrate is suitable up to 450°C, while Xylan 1070 performs effectively up to 200°C continuous; for higher temperatures, consider our A453 660 Bolt.
A: The B7M substrate is suitable up to 450°C, while Xylan 1070 performs effectively up to 200°C continuous; for higher temperatures, consider our A453 660 Bolt.
2. Q: Does this bolt meet NACE MR0175 / ISO 15156 for sour service?
A: Yes, ASTM A193 B7M with HRC 22 max is fully compliant with NACE MR0175 for H₂S environments.
A: Yes, ASTM A193 B7M with HRC 22 max is fully compliant with NACE MR0175 for H₂S environments.
3. Q: Can I get third-party inspection or witness testing for this order?
A: Yes, we support SGS, BV, or LLoyd's inspection at the Chinese factory upon request.
A: Yes, we support SGS, BV, or LLoyd's inspection at the Chinese factory upon request.
4. Q: What is the difference between B7M and standard B7 for bolting?
A: B7M has restricted hardness and higher toughness, specifically designed to resist SSC, while B7 is for general high-strength use.
A: B7M has restricted hardness and higher toughness, specifically designed to resist SSC, while B7 is for general high-strength use.
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