This is a high-strength structural bolt conforming to ASTM A325 standard, Heavy hex structural bolts are designed for steel-to-steel structural connections. designed for heavy-duty connections in steel structures such as buildings, bridges, industrial plants, and towers. Made from alloy steel and heat-treated for enhanced tensile and shear strength, it provides reliable performance under load. The hexagonal head allows for easy installation with wrenches or sockets, while the shank is available in both fully threaded and partially threaded versions to suit different joint requirements.
The bolts are coated with zinc plating to resist corrosion in both indoor and outdoor environments. Typically used in conjunction with matching nuts and washers for high-strength bolted joints, ensuring structural integrity and safety. As the head is unmarked (no grade marking), this version is suitable for applications where visual identification is not required or as a replacement component. Commonly used in construction, equipment assembly, and mechanical engineering projects.
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Material: |
Carbon Steel |
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Standard: |
ASME B18.2.1 DIN931 Head type Heavy Hex |
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Grade: |
A307B,F3125 Grade A325 Type 1,A193-B-7 |
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Thread size: |
3/16"~2" (M5~M52) |
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Length: |
1/2"~6" ( 12mm~600mm) |
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Coating: |
Plain, Black, oxided, zinc, HDG, etc |
About MBY
Established in 2004, JIAXING SINI FASTENER CO., LTD. has over 20 years of experience in the fastener field. We are a well-known leading exporter of bolts and screws. Our specialization lies in supplying both standard and custom-engineered bolts and screws.
In addition to manufacturing products that meet DIN and IFI standards, SINI FASTENER also has the capability to produce according to customer-specific designs and drawings. Most items are available in steel and stainless steel, and can be provided in both inch and metric sizes.
• Bolts: Manufactured in diameters from 3/16” to 1 1/2” (5mm–52mm) and lengths from 1/2” to 60” (10mm–1500mm). Our most competitive products include carriage bolts and round head bolts.
• Screws: Produced in diameters from #4 to 1/2” (3.5mm–12mm) and lengths from 1/2” to 60” (10mm–1500mm). Our key advantage lies in corrosion-resistant construction screws.
With production facilities located in Haiyan, Zhejiang and Lianyungang, Jiangsu, we serve customers across North America, South America, and Europe. Our diverse client base spans industries such as construction hardware, machinery, machine tools, electrical appliances, and furniture.
SINI FASTENER is ISO 9001 certified, ensuring consistent quality and reliability.
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