F3125/A325/A325m/A490/A490m Carbon Steel Hex Bolt
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Product Highlights
- ASTM F3125 Compliance: Meets ASTM F3125 specifications for high strength structural bolts with 830 MPa tensile strength.
- Hot Dip Galvanized Finish: Provides excellent corrosion resistance with thick zinc coating for steel to steel connections.
- Heavy Hex Head Design: Features heavy hex head and full body diameter for secure structural steel connections.
- Wide Size Range: Available in sizes from 1/2 inch to 1-1/2 inch and M12 to M36 metric.
- Multiple Grade Options: Offered in 8.8, 10.9, and 12.9 grades for various strength requirements.
- Customizable Packaging: Supports custom logos and carton requirements to meet specific customer needs.
- Fast Delivery for Stock: In-stock items can be delivered within 2-5 days for immediate project needs.
- Quality Certification: Includes MTC and mill certificates for every shipment to ensure quality control.
Product Attributes
- Customization
- Available
- Material
- High Strength Steel
- Type
- Hexagon Head
- Model NO.
- ASTM-AS325, ASTM-A325m
- Connection
- Common Bolt
- Head Style
- Hexagonal
- Standard
- DIN, ANSI, GB, JIS, ISO
- Grade
- 8.8
- Application
- Machinery, Chemical Industry, Environmental, Building
- Finish
- Hot Galvanizing
- Usage 1
- Steel Structure Bolt
- Usage 2
- Construction Bolt
- Feature
- with 2h Nut F436m
- Type 1
- Steel Hex Head Bolt
- Transport Package
- 25kgs/Box, Bulk in Pallet
- Specification
- 1/2"---1-1/2", M12-M36
- Trademark
- QBH
- Origin
- China
- HS Code
- 73181500
- Production Capacity
- 500tons/Year
- Package Size
- 26.00cm * 26.00cm * 14.00cm
- Package Gross Weight
- 25.000kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of F3125/A325/A325m/A490/A490m Carbon Steel Hex Bolt
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F3125/A325/A325m/A490/A490m Carbon Steel Hex Bolt -
F3125/A325/A325m/A490/A490m Carbon Steel Hex Bolt -
F3125/A325/A325m/A490/A490m Carbon Steel Hex Bolt -
F3125/A325/A325m/A490/A490m Carbon Steel Hex Bolt -
F3125/A325/A325m/A490/A490m Carbon Steel Hex Bolt -
F3125/A325/A325m/A490/A490m Carbon Steel Hex Bolt -
F3125/A325/A325m/A490/A490m Carbon Steel Hex Bolt
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Product Description
QBH ASTM A325 A325M HDG YZP BLACK ZP Plain Zinc Full Thread /
Half Thread 2H Nut F436m Washer Heavy Hex Industry Building
Construct Structural Bolt
A325/A325M History
This specification covers two types of quenched and tempered, steel, metric heavy hex structural bolts having a minimum tensile strength of 830 MPa (Note 1).
Formerly under the jurisdiction of Committee F16 on Fasteners, this specification was withdrawn in May 2016 and replaced by Specification F3125/F3125M for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi (830 MPa) and 150 ksi (1040 MPa) Minimum Tensile Strength, Inch and Metric Dimensions. Specification F3125/F3125M supersedes and replaces specifications; A325, A325M, A490, A490M, F1852 and F2280. The unified Specification F3125/F3125M corrects known inconsistencies in the original documents and the combination will assure that requirements of the products covered under the original standards stay aligned.
ASTM Standards
A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
A563M Specification for Carbon and Alloy Steel Nuts (Metric)
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
D3951 Practice for Commercial Packaging
F436M Specification for Hardened Steel Washers (Metric)
F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets (Metric)
F788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
F959M Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners (Metric)
F1136M Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners (Metric)
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F1789 Terminology for F16 Mechanical Fasteners
G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
ASME Standards
B1.13M Metric Screw Threads
B18.18.3M Inspection and Quality Assurance for Special Purpose Fasteners
B18.2.3.7M Metric Heavy Hex Structural Bolts
B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products
Note: In 2016, ASTM A325M was officially withdrawn and replaced by ASTM F3125, in which A325M now becomes a grade under the F3125 specification. The F3125 specification is a consolidation and replacement of six ASTM standards, including; A325, A325M, A490, A490M, F1852, and F2280. We are choosing to keep this technical information about the now obsolete A325M specification on our website for reference and informational purposes only.
| STYLE | Heavy Hex Bolts and Nuts |
| STANDARD | ASTM A325 A325m |
| Brand | QBH |
| Model No. | QBH-A325 Series , QBH-A325M |
| Web | qbfastener.en.made-in-china.com |
| SIZE | 1/2"---1-1/2" , M12-M36 |
| CLASS(Carbon steel) | 8.8,10.9,12.9 |
| Coating(Carbon steel) | black, zinc, HDG, Heat treatment, Dacromet, GEOMET |
| MATERIAL | Carbon steel |
| PACKING | bulk/ boxes in cartons, bulk in polybags/ buckets, etc. |
| PALLET | solid wood pallet, plywood pallet, ton box/bag, etc. |
Product Description
The most common heavy hex head screw, these steel screws meet ASTM A325 regulations for
structural joints, such as mating I-beams and scaffolding. Material meets ASTM F3125
specifications for quality. Dimensions meet ASME B18.2.6 specifications.
Partially threaded screws come with precise threaded and unthreaded portions, allowing you to place
only the stronger unthreaded portion (grip) in joints subjected to sideways forces.
Hot-dipped galvanized screws have a thick coating for excellent corrosion resistance. To ensure
compatibility, use these screws with hot-dipped galvanized steel nuts.
ASTM A325M structural bolts are designed for steel to steel connections. Because they are used in
such a specific application, they have dimensional characteristics that are unique and limited compared
to most other fastener grades. This includes stock sizes available in the market place, length tolerances,
short thread lengths, and the actual head dimensions are the same as any heavy hex head bolt
(Dimensions per ASME B18.2.6M 2012).
ASTM A325M covers high strength structural bolts used in structural steel connections. A325Ms have
a heavy hex head, a full body diameter, and are normally short in overall length since they are connecting
steel to steel. Unlike other ASTM grades, A325M is specific not only in the chemical and mechanical
requirements, but also in the allowed configuration. These bolts are manufactured from a medium-carbon
or medium-carbon alloy steel that is quenched and tempered to develop the desired mechanical properties.
More Details
Flange Bolt
Anchor Bolt - Seismic Wedge Anchor Shear Stud ( Click the Following
Picture to Jump the Product Page)
Free Samples for Standard Fastener from Jiaxing City Qunbang Hardware
We Promise:
1.High quality
2. Competitive price
3. The shortest delivery
4. The fastest response
5. The best service
FAQ
1.What's your experience like?
Our general manager has been engaged in the export of fasteners since 2005.
Our team can provide you with professional fasteners selling and smooth export services.
2.How about your price?
High quality products with reasonable price. Please give me a inquire, We will quoted you a price for you refer at once.
3. How do you control your quality?
We require the quality control department to inspect every production link of each shipment. And we can provide you MTC and mill certificate when the goods is finished.
4.How about your delivery time?
General speaking, if the goods is in stock, we can delivery them with 2-5days, If the quantity is 1-2container, we can give you with 18-25days,if the quantity is more than 2 container and you are very urgent, we can let factory priority produce your goods.
5.What is your packing?
Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallets is about 900-960kg, We also can make customer's logo on the cartons. Or we customized cartons according to customers' requirement.
6.What is your payment term?
We can accept T/T,LC for general order ,Paypal and Western union for small order or samples order.
Awaiting for your kind inquiry! Thanks & best regards!
For more information: http://qbfastener.en.made-in-china.com
About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR2531789". Items marked "
" are certified.
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Company Profile
Jiaxing City Qunbang Hardware Co., Ltd. (brand: QBH) is a fastener enterprise integrating production, design, sales, and after-sales service. The company is located in the Hangzhou-Jiaxing-Huzhou Plain, close to Shanghai, Ningbo, and Zhapu ports. Thanks to its superior geographical position and convenient transportation, the company has natural advantages for export business.
The company mainly produces high-strength fasteners, with bolts and nuts as its core products. The main standards include DIN, ANSI/ASME, JIS, UNI, ISO, AS, BS, GB, and others. Our products are widely used in bridges, roads, petroleum pipeline facilities, wind power generation, and steel structure projects. Carbon steel bolts are available in grades 4.8, 5.8, 6.8, 8.8, 10.9, and 12.9; Nuts in grades 4, 6, 8, and 10. Stainless steel fasteners are mainly made of 201, 304, and 316. Since its establishment, QBH has undergone over ten years of development. We are equipped with comprehensive testing equipment and maintain good cooperation with SGS and TUV. Each batch of products is accompanied by a 3.1 or 3.2 certificate, further ensuring quality.
In 2017, we registered the trademark "QBH" in China, the EU, and the United States, and obtained six fastener product patents. We have also been awarded the Zhejiang Province Science and Technology Small and Medium-sized Enterprise certificate and the ISO9001: 2000 certificate. As the company continues to grow and customers demand more diversified products, we have further strengthened our manufacturing capabilities.
In 2025, QBH officially expanded with two new factories:
China Factory (Ningbo):
NINGBO QB FASTENER MANUFACTURING Co., Ltd.
Address: No. 100, Tianshen Road, Jiulonghu, Zhenhai, Ningbo City, Zhejiang Province, China
Vietnam Factory:
KHAI TIN HUY PRODUCTION AND TRADING COMPANY LIMITED
Address: Street No. 1, Thuan Dao Expanded Industrial Park, Long Dinh Ward, Can Duoc District, Long An, Vietnam
With the addition of these new facilities, QBH has significantly increased production capacity, optimized cost structures, and enhanced supply chain flexibility. Starting from 2015, QBH had already begun cooperating with several fastener enterprises to enrich product variety and improve pricing. Now, with our own manufacturing bases in both China (Ningbo) and Vietnam, we can offer even more competitive prices, shorter lead times, and better quality control across a wider range of products.
QBH has always been committed to providing customers with efficient, convenient services and high-quality products. Our mission is to create a pleasant trading experience for our customers, deeply participate in their construction projects, and make progress together. This means we continuously strive to offer better and more cost-effective solutions, helping customers stand out in a competitive market.
QBH promises to always provide you with excellent quality, efficient service, and very competitive prices. We believe our cooperation is not only business-based but also an opportunity to open new markets together on a win-win basis. We thank all our past customers for their great support and help, which have allowed us to grow step by step. At the same time, we look forward to establishing new business relationships with you in the near future.
About Our Factory & Business Background
- Address
- No375, Tongle Road, Nanhu District, Jiaxing City, Zhejiang Provice, Jiaxing, Zhejiang, China
- Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment, OA
- International Commercial Terms(Incoterms)
- FOB, CFR, CIF, DDP, EXW, Others
- Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: within 15 workdays - Nearest Port
- SHANGHAI, NINGBO
Our Production Capability & Technical Expertise
- Main Products
- Fastener, Nuts, Bolts, Thread Rod, Washer, Hex Nuts, Hex Bolts, A194-2h, A325/A325m, A490/A490m
Our Industry Experience & Global Business Record
- Export Year
- 2004-01-10
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
FAQ
- What is your experience like?
- Our general manager has been engaged in the export of fasteners since 2005. Our team can provide you with professional fasteners selling and smooth export services.
- How about your price?
- High quality products with reasonable price. Please give me a inquire, We will quoted you a price for you refer at once.
- How do you control your quality?
- We require the quality control department to inspect every production link of each shipment. And we can provide you MTC and mill certificate when the goods is finished.
- How about your delivery time?
- General speaking, if the goods is in stock, we can delivery them with 2-5days, If the quantity is 1-2container, we can give you with 18-25days,if the quantity is more than 2 container and you are very urgent, we can let factory priority produce your goods.
- What is your packing?
- Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallets is about 900-960kg, We also can make customer's logo on the cartons. Or we customized cartons according to customers' requirement.
- What is your payment term?
- We can accept T/T,LC for general order ,Paypal and Western union for small order or samples order.
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