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Trusted by Over 1000 Customers All Over the World
Trusted by Over 1000 Customers All Over the World
FastenMetal is one of the best Big bolts manufacturers In China, we manufacture big bolts ranged from M20 to M130 and length from 30cm to 3meters. We also manufacture special big bolts and extra long bolts according to customer drawings.
Stainless Steel Forged Big Hex Bolts are large, heavy-duty bolts made from stainless steel, providing excellent strength and corrosion resistance. These bolts are created through a forging process, which enhances their durability and toughness, making them suitable for high-stress applications in construction, heavy machinery, and marine environments. The large hexagonal head allows for secure fastening with standard tools, ensuring a strong hold even in challenging conditions.For quotes,inquiries,or custom bolts request, please feel free to click the button”get a free quote”.
Material: 40Cr、35CrMo、42CrMo,Stainless Steel, titanium ,Inconel,etc
Standard:GB/T5782-5783
Finish: As finished
Size:M16-M80
Strength Grade:Grade8.9,10.8.12.8
Stainless Steel Hex Giant Bolts are large, heavy-duty fasteners made from stainless steel, known for their strength and resistance to rust and corrosion. They have a hexagonal head for easy tightening with wrenches or sockets, making them ideal for securing large structures or machinery. The “giant” size indicates they are used in high-stress applications, such as construction, industrial equipment, or marine environments where durability and long-lasting performance are essential.For quotes,inquiries,or non-standard giant bolts and nuts request, please feel free to click the button”get a free quote”.
Material:Stainless Steel
Grade:8.8,10.9,12.9
Size:M6-M130
Finish:As finished
Blacken Large Eye Bolts are heavy-duty metal fasteners with a loop or “eye” at one end. They are commonly coated with a black finish for corrosion resistance and durability. These bolts are used to secure or anchor objects, often in construction, lifting, or rigging tasks. The “large” size indicates they can handle greater loads, and the eye provides a point to attach ropes, chains, or cables.
For quotes,inquiries,or non-standard giant bolts and nuts request, please feel free to click the button”get a free quote”.
Material:Carbon Steel, Stainless Steel,Titanium
Grade:8.8,10.9,12.9
Size:M6-M130
Finish:Blacken
Extra Large Nuts and Bolt are those oversized fasteners used for heavy-duty construction and industrial applications. These components, larger than standard sizes, are designed to securely hold together massive structures like bridges, machinery, or buildings. They are typically made from durable materials like steel or alloy to handle high stress and load..For quotes,inquiries,or non-standard giant bolts and nuts request, please feel free to click the button”get a free quote”.
Material:Carbon Steel, Stainless Steel,Titanium
Grade:8.8,10.9,12.9
Size:M6-M130
Finish:Blacken
The Blacken High Strength Hex Big Bolt is a large, heavy-duty bolt with a hexagonal (six-sided) head, designed for industrial or structural applications. It is blackened for added corrosion resistance and strength, making it suitable for high-stress environments. These bolts are typically used in construction, machinery, or other applications where strong, secure fastening is required.For quotes,inquiries,or non-standard large bolts request, please feel free to click the button”get a free quote”.
Material:Carbon Steel, Stainless Steel,Titanium
Grade:8.8,10.9,12.9
Size:M6-M130
Finish:Blacken
Still not finding what you’re looking for? For fasteners that are unavailable as standard products, or for very specific requirements, we can manufacture custom fasteners and fixings exactly to your specifications or drawings.
Big bolts also known as large bolts or giant bolts. Big bolts refer to bolts with a diameter over 20mm and a length of over 100mm, usually used for connecting big structural components. They look like regular bolts but are bigger, stronger, and can carry heavier loads. Large bolts are classified into different grades based on connection needs, such as standard, high-strength, and ultra-high-strength types.We also manufacture giant nuts, please click it.
Large bolts are primarily used to connect and secure larger components, such as bridges, stadiums, and wind power plants. Therefore, hot-rolled steel is typically used as the raw material. Below is the entire manufacturing process:
1.Preparing Round Bars: Round bars are used only for producing large bolts. For smaller bolts, coil wire is generally used. Five to six round bars are placed on a saw bed and cut to a uniform length.
2.Heating: An electric furnace heats a section of the raw material, reaching temperatures close to the melting point of steel in just a few seconds.
3.Stamping: The softened end moves to the next step for reshaping, where 60 tons of stamping forms the bolt head into a hexagonal shape. The seamless formation ensures that no joints are left, making the processed bolt more durable. The hot-formed blanks fall into a collection box to cool slowly.
4.Shot Peening: The bolts are rolled together with small steel balls in a shot peening machine. The friction generated removes surface oxides, enhancing the surface’s stress and strength.
5.Molding: Workers place the bolts into a mold and strike the head to create a small central hole at one end for easier installation on a lathe. A machine then shapes the curvature of the bolt’s surface, restoring its original metallic luster. This step requires high precision, as any slight error can affect the thread accuracy, making it difficult for the bolt to screw into the nut.
6.Thread Rolling: Many people think threads are cut, but this step, called thread rolling, uses two plates with thread-rolling grooves. By applying tens of tons of pressure without cutting any metal, threads are formed.
7.Quality Inspection: Finally, quality control personnel inspect the completed bolts. If the threads fit into the gauge, these bolts are ready to fulfill their purpose.
The large bolts we manufacture are generally under M42 in diameter, with a length of about 500 mm. However, we are capable of producing bolts ranging from M30 to M130, with lengths of up to 1500 mm.
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