Blackened Bolts

Specification

Head	Height5/16 in
Tensile Strength	150,000 psi
Thread Direction	Right Hand
Flange Diameter	11/16 in
Screw Size	5/16 in
Type	Flange Bolts
Material	Steel
Fastener Length	7/8 in
Minimum Thread Length	7/8 in
Thread Size	5/16"-18

Types of Blackened Bolts

The blackened bolts produced by our company mainly include the following types:

Stud Bolts
Stud bolts are widely used in the construction field, mainly including steel structure connection, foundation construction, curtain wall installation, etc. The following are some specific application scenarios.

Anchor Bolts
Embedded anchor bolts: need to be poured into the concrete foundation once or twice, including hook type, claw type and anchor plate type. Claw type anchor bolts have good adhesion and are suitable for fastening large and medium-sized equipment; anchor plate type has the best adhesion and positioning verticality, and is suitable for fastening large and heavy equipment with impact.

Flange Bolt
The flange bolt products produced by our factory are selected from high-quality raw materials in Hebei Province, using advanced production equipment and processes in the industry. The product quality is excellent and the supply is sufficient. Customers with needs are welcome to visit the factory.

Full Thread Screw
Carbon steel full-thread lead screw: It has high strength and hardness, can withstand large loads, has a relatively low price, and is widely used. Generally, it is subjected to surface treatments such as galvanizing and blackening to improve its corrosion resistance.

Steel Structure Bolts
During foundation construction, first reserve bolt holes or embed anchor bolts in the foundation according to design requirements. After the steel column is hoisted in place, align the bottom plate hole of the steel column with the anchor bolt, put on and put on the nut, and adjust the position of the nut to accurately adjust the elevation and verticality of the steel column.

Hexagon Head Bolts
The storage of hexagonal bolt products needs to pay attention to environmental conditions, storage methods, management specifications and other aspects to ensure that the quality and performance of the bolts are not affected.

Benefits of Blackened Bolts

01.

High Load Capacity and Strength

Blackened bolts are known for their ability to handle substantial loads, making them ideal for structural and heavy – duty applications. Their high tensile strength allows them to withstand significant stress while maintaining the assembly’s integrity. This makes bolts a reliable choice for construction, heavy machinery, and infrastructure projects.

02.

Ease of Installation and Removal

One of the key advantages of bolts is their straightforward installation and removal process. Bolts can be easily tightened or loosened using common tools such as wrenches or spanners. This ease of disassembly is particularly useful for applications requiring frequent maintenance and part replacement, like machinery and equipment.

03.

Adjustability

Blackened bolts offer a high degree of adjustability when used with nuts. This allows for precise control over the tension and alignment of the components being fastened. This adjustability is crucial for applications like automotive suspension systems, where precise positioning is key to optimal performance.

04.

Safety and Inspection

Bolts are a safer alternative to welding, which involves high temperatures and fire risks. Bolted connections can be visually inspected easily, allowing for straightforward identification of wear and tear or potential failures. This is critical for maintaining structural integrity in various applications.

Applications Of Blackened Bolts

1. Construction and Infrastructure

In construction, blackened bolts are essential for ensuring the structural integrity of buildings and infrastructure. Structural bolts connect steel beams, columns, and other components in high-stress structures like bridges and skyscrapers. Their high load-bearing capacity provides the necessary strength and stability, allowing these structures to withstand heavy loads and environmental forces. Additionally, the ease of installation and disassembly of blackened bolts facilitates the construction process and enables future modifications or repairs.

2. Automotive Industry

Bolts play a crucial role in the automotive industry. They are used in vehicle assembly to secure engine components, attach the chassis and body parts, and ensure the durability and adjustability of suspension systems. Bolts’ ability to handle dynamic loads and offer precise adjustability is crucial for vehicle safety and performance. For example, in suspension systems, bolts allow for fine-tuning of alignment and tension, which directly impacts the handling and ride comfort of the vehicle.

3. Aerospace and Defense

High-strength bolts are essential in the aerospace and defense sectors. Aircraft and military equipment often operate under extreme conditions and are subjected to high dynamic loads. Bolts used in these applications are made from advanced materials such as titanium and high-strength steel, which can withstand these harsh environments. They are used to assemble critical components, ensuring the reliability and safety of the equipment during flight or combat operations.

4. Oil and Gas

In the oil and gas industry, bolts are used in drilling rigs and pipelines. These applications require fasteners that can withstand harsh environmental conditions, including high pressure, corrosive substances, and extreme temperatures. Bolts provide a secure connection that maintains the integrity of the equipment and prevents leaks, which is crucial for safety and operational efficiency. Bolts’ versatility allows their use in various parts of the oil and gas infrastructure, from offshore platforms to onshore refineries.

5. Heavy Machinery

Heavy machinery, such as cranes, excavators, and manufacturing equipment, relies on bolts for assembly and maintenance. Blackened bolts secure machinery components, withstand high operational stresses, and their adjustability aids in aligning and calibrating machinery, enhancing performance and longevity. The high load capacity of bolts makes them suitable for heavy-duty applications, ensuring the safe and efficient operation of the machinery.

Payment and Shipping Terms

Shipping	We offer various shipping methods, including sea freight, and express delivery, depending on the order size and destination.
Terms Of Payment	We usually accept T/T, L/C, Paypal, Credit card, etc. If you prefer other payments terms, please feel free to discuss with us.

Certificate

productcate-1-1

FAQ

Q: Will black bolts rust?

A: Yes. Black oxide adds a basic protection from corrosion and abrasion to fasteners. Like any material, black oxide treated steel fasteners can rust in the right environments. This obviously is not the case for black oxide coated stainless steel, as stainless still retains its normal corrosion protection.

Q: Does black oxide coating wear off?

A: While a proper black oxide finish shouldn't flake or rub off, it's not as durable as a lot of other finish options.

Q: What grade are black oxide bolts?

A: Made from heavy-duty grade 8 alloy steel with a black oxide finish, these bolts offer exceptional strength and moderate corrosion resistance, making them ideal for high-stress applications.

Q: What is the difference between black and silver bolts?

A: What is the difference between the black and the silver bolts? The black bolts you are sent are A325 bolts and the silver bolts are A307 bolts. A325 bolts are much stronger and are used in conections that require more strength.

As one of the leading blackened bolts manufacturers and suppliers in China, we warmly welcome you to wholesale bulk customized blackened bolts from our factory. Contact us for more discount information.

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