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Ningbo Yongbiao International Business Co., Ltd supplies ASTM A193 heavy hex bolts in chromium-molybdenum alloy steel, specifically Grade B7, designed for high-pressure and high-temperature service. These bolts are engineered to meet ASTM A193 specifications, with superior tensile and yield strength for critical applications in oil and gas, petrochemical, and power generation industries. Sizes range from 1/2 inch to 4 inches in diameter, with bulk packaging in cartons or wooden crates for international export.
The Grade B7 bolts are manufactured from alloy steel, providing enhanced strength and heat resistance compared to standard carbon steel. Typical industry use includes flange connections, valve assemblies, and pressure vessel components where structural reliability under extreme conditions is paramount. The bolts conform to ASME B18.2.1 dimensional standards, with heavy hex heads ensuring a broad bearing surface. Common finishes include hot-dip galvanising for corrosion protection in harsh environments.
These bolts are exported globally, with free samples available upon request. The supplier’s ISO 9001:2015 certification ensures adherence to quality management processes, and after-sales support is provided to address any post-delivery issues. Ideal for engineers and procurement teams sourcing fasteners for heavy-duty industrial projects, these bolts are backed by the supplier’s experience in producing high-integrity fasteners to exacting standards.
| Standard | ASTM A193 |
| Material | chromium-molybdenum alloy steel (Grade B7) |
| Grade | B7, B7M, B8, B8M, B16 |
| Diameter Range | 1/2 inch to 4 inches |
| Head Type | heavy hex (ASME B18.2.1) |
| Typical Tensile Strength (Grade B7) | 100,000 psi minimum (ASTM A193) |
| Typical Yield Strength (Grade B7) | 75,000 psi minimum (ASTM A193) |
| Thread Type | UNRC or UNC (standard for ASTM A193) |
| Typical Hardness (Grade B7) | 22 to 34 HRC (heat-treated, standard range) |
| Packaging | carton, tray, wooden crate |
| Port of Shipment | Ningbo |
Ningbo Yongbiao International Business Co., Ltd is located in Jiulonghu Town, Zhenhai, Ningbo, China, with a postal code of 315200. The company specialises in the production and export of ASTM-standard fasteners, including heavy hex bolts for high-pressure applications. Its ISO 9001:2015 certification demonstrates compliance with international quality management standards.
The supplier offers a range of products under the brand name NBMFG, with ASTM A193 heavy hex bolts as a flagship line. Custom specifications can be accommodated, and the company provides free samples to potential buyers. After-sales service includes follow-up on goods and assistance with resolving any post-delivery issues. The harbor trust tier reflects a verified operational status, though response metrics are not publicly disclosed.
ASTM A193 Grade B7 Heavy Hex Bolts are high-strength fasteners manufactured from chromium-molybdenum alloy steel, designed for high-pressure and high-temperature applications in oil gas, petrochemical, and power generation industries. These heavy hex head bolts meet ASTM A193 specifications with superior tensile and yield strength. Available in sizes from 1/2 inch to 4 inches diameter, exported in bulk cartons or wooden crates for international trade. Ideal for flanges, valves, and pressure vessel assemblies requiring reliable structural integrity under extreme conditions.
| Business Type | Supplier |
| Year Established | Recently Joined |
| Employees | Contact Supplier |
| Annual Revenue | Contact Supplier |
| Main Products | View Products Tab |
| Major Markets | Global |
| Response Time | <4h |
| Response Rate | New Supplier |
Before placing an order, confirm the exact ASTM A193 grade and material composition to ensure compatibility with your application’s temperature and pressure requirements. Request material test reports and certificates of compliance to verify that the bolts meet the specified standards. For custom sizes or finishes, provide detailed drawings and specifications to avoid discrepancies.
Discuss logistics early, including lead times for standard and custom orders, as production schedules may vary. Agree on Incoterms such as FOB Ningbo or CIF to your destination port, and clarify whether cartons, trays, or wooden crates will be used for packaging. Payment terms, including T/T or L/C, should be finalised to secure production slots, especially for large or urgent orders.
Upon delivery, perform dimensional checks against ASME B18.2.1 and inspect the finish for uniformity and defects. For high-integrity applications, consider third-party inspection or witness testing for mechanical properties like tensile strength and hardness. Retain all documentation, including ISO 9001:2015 certificates and packing lists, for quality assurance and future reference.
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When sourcing Astm A193 Heavy Hex Bolts for your business, securing the right balance of quality and cost is essential. Ningbo Yongbiao International Business Co., Ltd, a verified supplier based in China, offers this product with key specifications including ASTM A193 Grade B7 Heavy Hex Bolt, Chromium-Molybdenum Alloy Steel, tempered for high strength, and 1/2" to 4" diameter, various lengths; Heavy Hex Head configuration. By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $0.1/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 7318.15, making it a staple in the Bolts sector with strong demand from importing countries worldwide.
Importing Astm A193 Heavy Hex Bolts requires careful attention to shipping logistics, customs compliance, and secure payment terms. Ningbo Yongbiao International Business Co., Ltd offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. To ensure a smooth transaction, buyers should verify import duties for HS Code 7318.15 in their destination country. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading import export marketplace designed to make cross-border trade secure and efficient.
Finding trustworthy partners is the foundation of successful importing. The supplier of this Astm A193 Heavy Hex Bolts has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Bolts category and connect with top-tier exporters on our comprehensive online B2B marketplace. Start your sourcing journey today.
Importing Astm A193 Heavy Hex Bolts requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties for HS Code 7318.15 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
The current listed wholesale price for Astm A193 Heavy Hex Bolts from Ningbo Yongbiao International Business Co., Ltd is $0.1/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Ningbo Yongbiao International Business Co., Ltd through EximNext.
The supplier, Ningbo Yongbiao International Business Co., Ltd, has set a Minimum Order Quantity (MOQ) of 1 Bags for Astm A193 Heavy Hex Bolts. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
For international shipping and customs clearance, Astm A193 Heavy Hex Bolts is classified under HS Code 7318.15. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
To import Astm A193 Heavy Hex Bolts from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Ningbo Yongbiao International Business Co., Ltd. Ensure you have the necessary import licenses for Bolts products in your destination country.
Yes, Ningbo Yongbiao International Business Co., Ltd is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
The key specifications for Astm A193 Heavy Hex Bolts supplied by Ningbo Yongbiao International Business Co., Ltd include ASTM A193 Grade B7 Heavy Hex Bolt, Chromium-Molybdenum Alloy Steel, tempered for high strength, and 1/2" to 4" diameter, various lengths; Heavy Hex Head configuration. For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
Ningbo Yongbiao International Business Co., Ltd offers Astm A193 Heavy Hex Bolts with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Astm A193 Heavy Hex Bolts is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Ningbo Yongbiao International Business Co., Ltd through our platform.
Ningbo Yongbiao International Business Co., Ltd maintains international quality certifications. These ensure that the Astm A193 Heavy Hex Bolts meets international quality, safety, and regulatory standards required for cross-border trade.
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Ningbo Yongbiao International Business Co., Ltd will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Ningbo Yongbiao International Business Co., Ltd.
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