Import Astm A193 Heavy Hex Bolts — Buy in wholesale FOB from Supplier in China
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ASTM A193 Heavy Hex Bolts
ASTM A193 Heavy Hex Bolts from Ningbo Steel Bolt Co., Ltd are premium fasteners designed for high-temperature and high-pressure applications, such as flanges, pressure vessels, and pipeline assemblies. The bolts are available in alloy steel grades B7, B7M, and B16, as well as stainless steel grades B8 and B8M (304/316L), each offering distinct mechanical properties. Grade B7, for example, provides a typical tensile strength of 860 MPa minimum and yield strength of 690 MPa minimum after heat treatment.
The heavy hex design features a larger head and thicker shank compared to standard hex bolts, providing enhanced load distribution and resistance to loosening under vibration. These bolts are typically supplied with fine threads (UNF or UNEF) for improved grip in critical joints. Surface treatments include hot-dip galvanizing (HDG), zinc plating, black oxide, Dacromet, or plain finish, with HDG being the most common for corrosion resistance in outdoor or marine environments.
Primary buyers include oil and gas, petrochemical, and power generation industries, where these bolts are used in flanged connections, valve assemblies, and structural joints. The bolts are often paired with ASTM A194 nuts and washers to ensure compatibility. For bulk imports, confirm whether the supplier provides test certificates (e.g., EN 10204 3.1) and whether custom lengths or thread configurations are available.
| Standard | ASTM A193 |
| Grades Available | B7, B7M, B16 (Alloy Steel), B8, B8M (Stainless Steel 304/316L) |
| Head Type | Heavy Hex |
| Thread Type | Fine Thread (UNF/UNEF) typical |
| Tensile Strength (Grade B7) | 860 MPa minimum |
| Yield Strength (Grade B7) | 690 MPa minimum |
| Tensile Strength (Grade B8) | 620 MPa minimum typical |
| Surface Treatment | HDG, Black, Zinc, YZP, Plain, Dacromet |
| Heat Treatment | Quenched and Tempered (for alloy steel grades) |
| Typical Diameter Range | 1/4" to 4" typical |
| Typical Length Range | 25 mm to 300 mm or custom |
Ningbo Steel Bolt Co., Ltd is located in Panjiashan, Xiepu Town, Zhenhai District, Ningbo, Zhejiang Province, China. The company operates within the harbor trust tier, though its response rate and average response time are not currently reported. Its product focus includes high-strength fasteners, with ASTM A193 heavy hex bolts as a key offering for industrial applications.
The supplier emphasizes flexibility in customization, including support for custom designs and logos, which suggests a willingness to tailor products to buyer specifications. However, the profile does not disclose certifications, production capacity, or client references. Buyers should verify quality control processes, such as in-house testing for tensile strength and hardness, and request samples for independent validation.
ASTM A193 Heavy Hex Bolts are premium alloy and stainless steel fasteners engineered for high-temperature and high-pressure applications in oil and gas, petrochemical, and power generation industries. Available in grades B7, B7M, and B16 for carbon alloy variants, and B8 and B8M for stainless options, these heavy hex head bolts meet critical bolting specifications for pressure vessels, flanges, and pipeline assemblies. Widely sourced from Asian manufacturers for import projects, they offer excellent tensile strength and creep resistance in demanding service conditions.
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Sourcing ASTM A193 Heavy Hex Bolts from Ningbo Steel Bolt Co., Ltd - China Import Guide
Before placing an order, confirm that Ningbo Steel Bolt’s ASTM A193 bolts meet your project’s grade and material requirements. Request mill test certificates (MTCs) to verify chemical composition and mechanical properties, such as tensile strength and hardness. For critical applications, arrange for third-party inspection to ensure compliance with ASTM A193 standards, including dimensional checks and surface finish quality.
Logistics for heavy hex bolts often involve palletized or boxed packaging to prevent damage during transit. Discuss Incoterms such as FOB Ningbo or CIF destination port, and clarify whether the supplier handles export documentation, including packing lists and certificates of origin. Payment terms typically require a deposit, with the balance due prior to shipment, but negotiate these based on your relationship with the supplier.
Quality checks should include verifying the bolt grade markings, measuring thread pitch and diameter with calipers or thread gauges, and conducting hardness tests if equipment is available. For stainless steel grades (B8/B8M), perform a visual inspection for surface defects and confirm that the material’s corrosion resistance meets the application’s environmental conditions. Request a sample batch for testing before committing to a full order.
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30 suppliersBuy Astm A193 Heavy Hex Bolt in Bulk — Verified Supplier in China
When sourcing Astm A193 Heavy Hex Bolts for your business, securing the right balance of quality and cost is essential. Ningbo Steel Bolt Co., Ltd, a verified supplier based in China, offers this product with key specifications including B7, B7M, B16 (Alloy Steel); B8, B8M (Stainless Steel), ASTM A193 / ASME SA193, and Heavy Hex (Trapezoidal head, wider than standard hex). By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $8000/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 7318.16, making it a staple in the Bolts sector with strong demand from importing countries worldwide.
Astm A193 Heavy Hex Bolt Specifications, Trade Terms & Pricing
Importing Astm A193 Heavy Hex Bolt requires careful attention to shipping logistics, customs compliance, and secure payment terms. Ningbo Steel Bolt 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 7318.16 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 online B2B marketplace designed to make cross-border trade secure and efficient.
About Ningbo Steel Bolt Co., Ltd — Supplier in China
Finding trustworthy partners is the foundation of successful importing. The supplier of this Astm A193 Heavy Hex Bolt 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 B2B marketplace. Start your sourcing journey today.
Import Astm A193 Heavy Hex Bolt — Shipping, Logistics & Customs
Importing Astm A193 Heavy Hex Bolt 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 7318.16 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
Frequently Asked Questions About Astm A193 Heavy Hex Bolt
What is the wholesale price of Astm A193 Heavy Hex Bolts?
The current listed wholesale price for Astm A193 Heavy Hex Bolts from Ningbo Steel Bolt Co., Ltd is $8000/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 Steel Bolt Co., Ltd through EximNext.
What is the Minimum Order Quantity (MOQ) for Astm A193 Heavy Hex Bolt?
The supplier, Ningbo Steel Bolt Co., Ltd, has set a Minimum Order Quantity (MOQ) of 1 Bags for Astm A193 Heavy Hex Bolt. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for Astm A193 Heavy Hex Bolts?
For international shipping and customs clearance, Astm A193 Heavy Hex Bolts is classified under HS Code 7318.16. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import Astm A193 Heavy Hex Bolt from China?
To import Astm A193 Heavy Hex Bolt from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Ningbo Steel Bolt Co., Ltd. Ensure you have the necessary import licenses for Bolts products in your destination country.
Is Ningbo Steel Bolt Co., Ltd a verified supplier?
Yes, Ningbo Steel Bolt 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.
What are the key specifications of Astm A193 Heavy Hex Bolts?
The key specifications for Astm A193 Heavy Hex Bolts supplied by Ningbo Steel Bolt Co., Ltd include B7, B7M, B16 (Alloy Steel); B8, B8M (Stainless Steel), ASTM A193 / ASME SA193, and Heavy Hex (Trapezoidal head, wider than standard hex). For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
What packaging options are available for bulk orders of Astm A193 Heavy Hex Bolt?
Ningbo Steel Bolt Co., Ltd offers Astm A193 Heavy Hex Bolt with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import Astm A193 Heavy Hex Bolt the most?
Astm A193 Heavy Hex Bolt is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Ningbo Steel Bolt Co., Ltd through our platform.
What certifications does this Astm A193 Heavy Hex Bolt supplier hold?
Ningbo Steel Bolt Co., Ltd maintains international quality certifications. These ensure that the Astm A193 Heavy Hex Bolt meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Astm A193 Heavy Hex Bolts on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Ningbo Steel Bolt Co., Ltd will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
What payment methods are accepted?
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 Steel Bolt Co., Ltd.
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