Your Professional Carbon Steel Fasteners Supplier
Henan Shuangzhong Intelligent Technology Co., Ltd., an expert in precision manufacturing and pipeline system solutions, was founded in 1999. We are a professional manufacturer specializing in precision machining customization, pipeline equipment and pipe fittings customization, as well as the manufacturing and processing of rubber hoses.
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![Galvanized Anchor Bolts]()
Galvanized Anchor BoltsName:Galvanized Anchor BoltsSize：M8~M64 Standard：DIN 5299/ASTM F1554Material：Carbon steel: Low cost, suitable for dry environments, requires rust prevention treatment (galvanizing, painting); -
![ASTM A307 Carbon Steel Bolts]()
ASTM A307 Carbon Steel BoltsProduct Name:astm a307 carbon steel bolts. Customizable fastener types: bolts, nuts, screws, washers, rivets, pins, clamps, etc.. Material model: Carbon steel ASTM A307 Grade A/B. Material -
![Mild Steel Hex Bolt]()
Mild Steel Hex BoltProduct Name: mild steel hex bolt. Carbon: 0.45%-0.80% (up to 1.0%+ for ultra-high strength). Manganese: 0.60%-1.20%; Silicon: ≤0.40%. Optional Cr, Mo (enhance wear resistance); Martensitic -
![ASTM A307 Nuts]()
ASTM A307 NutsProduct Name: ASTM A307 Nuts. Material:C: 0.20-0.35%, Mn: 0.60-1.20%. Optional: Zn plating/HDG. Sizes:Metric: M6-M64 (Max M100). Inch: 1/4-2.5. Types:Hex/Heavy Hex/Flange. Standards:ASTM A307, ISO -
![Carbon Steel Hex Nut]()
Carbon Steel Hex NutProduct Name: Carbon Steel Hex Nut. Material: C: 0.20-0.50%, Mn: 0.60-1.65%. Optional: Black oxide/Zinc plating. Sizes:. Metric: M4-M56 (Max M72). Inch: #10-2. Types: Hex/Heavy Hex/Nylon Insert. -
![12.9 Hex Bolt]()
12.9 Hex BoltName: 12.9 Hex Bolt. Strength grade: 12.9 grade (international standard ISO 898-1). Material: medium carbon steel or alloy steel (such as 42CrMo, 35CrMo, etc.), quenched + tempered. Implementation
Why choose us
One-Stop Customized Solutions
We are committed to providing customers with one-stop customized solutions — from design support and precision manufacturing to quality assurance — to meet the diverse needs of various industries for high-performance, high-precision, and high-reliability industrial components.
Certification
We ensure quality through comprehensive system certifications: the company has passed the ISO 9001:2015 quality management system certification and the American Petroleum Institute (API) quality certification system.
Sales Market
Our products have been successfully exported to many countries and regions around the world, including the United States, Canada, Germany, India, Malaysia, Pakistan, the United Arab Emirates, Egypt, and the Middle East. We have earned the trust and praise of overseas customers.
On-Site Quality Supervision
We dispatch professional quality inspection teams to supervise the production of steel pipe fittings and rubber hoses. From raw material entry to the shipment of finished products, we maintain strict quality control throughout the process and accommodate special customer requirements, such as product identification and packaging methods.
Specification Table
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Category |
Details |
|
Standard |
ASTM A307 (Specification for Carbon Steel Externally Threaded Fasteners) |
|
Material |
Carbon steel (low to medium carbon content; typically C ≤ 0.30%) |
|
Types |
Type A: General-purpose fasteners for light to moderate loads. |
|
Mechanical Properties |
Tensile Strength: Type A: Min. 60 ksi (414 MPa); Type B: 60–100 ksi (414–690 MPa). |
|
Thread Standards |
Unified National Coarse (UNC) threads as per ASME B1.1; available in other thread types on request. |
|
Size Range |
Diameter: 1/4 inch to 4 inches (6.35 mm to 101.6 mm). |
|
Finish |
Plain (uncoated), zinc-plated (for corrosion resistance in mild environments), or other coatings (e.g., hot-dip galvanized) as required. |
|
Applications |
Construction: Wood/light steel structural connections, concrete formwork, and general building fixtures. |
|
Key Features |
Cost-effective: Economical due to low carbon steel composition. |
Strength and Ductility: Mild steel offers a good balance of tensile strength and ductility. It can withstand significant loads while still being able to deform slightly without breaking, which is crucial for applications where bolts may experience stress.
Cost-Effectiveness: Mild steel is generally less expensive than other materials, such as stainless steel or high-carbon steel. This makes it an economical choice for manufacturing large quantities of fasteners.
Ease of Machining and Fabrication: Mild steel is easier to machine and shape compared to harder materials. This allows for efficient production of nuts and bolts with precise dimensions.
Weldability: Mild steel can be easily welded, which is advantageous in applications where assembly or repair might require welding.
Corrosion Resistance: While mild steel itself is prone to rust, it can be easily treated with coatings (like galvanization) or used in environments where corrosion is not a significant concern. For applications requiring higher corrosion resistance, stainless steel or other alloys can be used, but mild steel remains common for general purposes.
Standardization: Mild steel is widely used in the fastener industry, leading to standardized sizes and specifications. This makes it easier to find compatible nuts and bolts for various applications.
Types of Carbon Steel Fasteners
Carbon Steel Bolts
Carbon Steel Bolts are used to hold together heavy structures, such as bridges, buildings, and machinery. They are also used in automotive & aerospace applications.
01
Carbon Steel Screws
In woodworking, construction, automotive industries, and various applications used Carbon Steel Screws. They come in various sizes & shapes, including wood screws, machine screws, & sheet metal screws.
02
Carbon Steel Washers
People use Carbon Steel Washers to distribute the load of a fastener and prevent damage to the surface being fastened. They are commonly used in automotive & construction applications.
03
Carbon Steel Pins
Using Carbon steel pins are align or secure two or more components together. They are commonly used in machinery, automotive, & aerospace industries.
04
Carbon Steel Nuts
Carbon Steel Nut is used in conjunction with bolts to hold together heavy structures. They are also used in automotive & aerospace industries.
05
Carbon Steel Stud Bolt Uses
Carbon steel stud bolts are commonly used in the construction and maintenance of bridges, buildings, ships, tanks, pipelines, heavy machinery, etc., as well as in manufacturing processes such as petrochemical plants. In addition to their strength and durability, they also provide flexibility since they can be adjusted for tension or compression when necessary. This makes them ideal for applications that require precise adjustments over time.
Do use appropriate torque specifications - Follow manufacturer guidelines to prevent thread stripping or fastener failure
Do check load ratings - Always verify the grade and strength requirements for your specific application
Do use protective finishes - Apply or select fasteners with appropriate plating for your environment
Do match fastener grades - When using nuts with bolts, ensure both are of compatible grades
Do store properly - Keep fasteners in a dry environment to prevent corrosion before use
Packing & Delivery
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Packing Details: |
A:Bulk in carton , then with pallet |
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B:Small box with carton , then with pallet |
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C:As customers' requirement |
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Delivery Details: |
In 30-90 days after order confirmed or received deposit,According to order. |
Our Certificate
FAQ
As one of the leading carbon steel fasteners manufacturers in China, we warmly welcome you to buy high quality carbon steel fasteners for sale here from our factory. Good service and reasonable price are available.
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