Your Professional Bolt Supplier
Founded in 2011 in Zhengzhou, Henan, our factory specializes in the manufacturing of automotive leaf springs for both aftermarket and OEM customers. We operate three dedicated production lines equipped with environmental protection systems, ensuring stable and compliant production under strict regulatory requirements. Our team consists of more than 150 skilled frontline workers, supported by 15 engineers and technicians and 30 professional office staff. With a well-managed manufacturing facility, standardized processes, and reliable inspection equipment, we focus on consistent quality, traceable production, and long-term cooperation. Our capabilities and disciplined operations enable us to serve international customers with confidence and reliability.
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![Bolt with Hexagon-head Or Screw Size M16x1.5-150mm ( Length Is Optional )]()
Bolt with Hexagon-head Or Screw Size M16x1.5-150mm ( Length Is Optional )1. The colour is black, we accept colour customized with large quantity.. 2. The grade has 8.8 and 10.9, both of them will be covered grease.. 3. All have Quenching and tempering treatment.. -
![Bolt with Round-head Bolt Or Screw Size: M16x1.5-150mm ( Length and Diameter Are Optional )]()
Bolt with Round-head Bolt Or Screw Size: M16x1.5-150mm ( Length and Diameter Are Option...1. The colour is black, we accept colour customized and coating customized with large quantity.. 2. The grade has 8.8 and 10.9, both of them will be covered grease.. 3. All have Quenching and -
![Bolt with Semi-round-head Bolt Or Screw Size: M20x1.5-240mm ( Length Is Optional )]()
Bolt with Semi-round-head Bolt Or Screw Size: M20x1.5-240mm ( Length Is Optional )1. The colour is black, we accept colour customized and coating customized with large quantity.. 2. The grade has 8.8 and 10.9, both of them will be covered grease.. 3. All have Quenching and
Why Choose Us
OEM & ODM Customization
Based on customer drawings or technical data, our engineers provide optimized designs aligned with application requirements and practical manufacturing conditions.
Production Market
Our products are distributed through authorized dealers across China and exported to North America, Latin America, the Middle East, and Southeast Asia.
Product Application
Our leaf springs are used in light, medium, and heavy trucks, buses, trailers, and construction vehicles.
Standard Quality & Warranty Support
Standard production control ensures stable quality, with a 6-month warranty from the start of use.
Bolt
A bolt is a robust mechanical fastener with external threading, designed to securely join components using a nut or threaded hole. Bolts play a crucial role in construction, automotive engineering, machinery, and infrastructure due to their strength, reliability, and versatility. Selecting the right type of bolt ensures structural integrity, safety, and longevity of assemblies.
Features of Bolt
Load Distribution: Washers spread the clamping force of the bolt over a larger surface area, reducing the risk of material deformation or crushing, especially in softer materials like wood or plastic.
Sealing Function: In certain applications (e.g., plumbing or outdoor enclosures), washers help create a watertight or airtight seal, preventing leaks and ingress of moisture or debris.
Prevention of Galling: By acting as a barrier between the bolt head or nut and the mating surface, washers reduce friction and protect against galling in metal-to-metal joints.
Spacing and Alignment: They serve as spacers to maintain proper gap and alignment, ensuring consistent tension and preventing premature fatigue.
Vibration Resistance: Specialized washers like lock washers or spring washers add tension to resist loosening caused by vibration and dynamic loads.
Types of Bolt
Hex Bolts
Hex bolts, also referred to as hex cap screws, are the most popular as they possess a six-sided head allowing easy gripping with wrenches or spanners. They are manufactured in different grades and thus find numerous applications ranging from low to high-stress securing of objects in mechanical equipment, manufacturing, and construction projects.
Carriage Bolts
These bolts are popular as they were designed to attach carriages' wheels. They possess a square-shaped protruding cylindrical and a rounded domed-arched head which resist turning and, therefore, ideal for wooden and metal structural connections. Today, they are used in many applications requiring a flush surface and anti-rotation features.
U-Bolts
U-Bolts were specifically designed to wrap around objects, such as pipes or rods, to provide a secure mounting point. Their shape looks like the alphabet U, with two threaded ends. U bolts are commonly used in automotive leaf spring suspension systems and plumbing and steel structure support systems.
Lag Bolts
Lag bolts resemble large hex head screws and are used with a spanner or wrench. Unlike other bolts, these are specifically designed for heavy-duty applications where strong and secure construction is needed when fastening heavy wood and metal structures. Lagging bolts are essential in construction and furniture assembling businesses.
T-Slot Bolts
These bolts are uniquely designed for T-Slot framing systems. They possess a T-shaped base that fits into the slots of extruded aluminum frames, which makes them ideal for modular construction, such as machine guards, frames, and enclosures. These bolts offer a flexible solution for building and adjusting structures.
Applications of Bolt
Construction Industry
Bolts are the main fastening elements used in the construction of buildings and bridges. Concrete structures use hex bolts while wooden frames incorporate lag bolts. They are indispensable in ensuring different components are securely attached to each other and contribute to the overall structural integrity.
Manufacturing
Bolts are widely used as an essential by-product in the manufacturing sector to assemble machinery, vehicles and equipment. They play a major role in securing critical elements such as motors, gears and structural frames. Based on their diversity, bolts are customized for specific tasks, thus optimizing production efficiency, reliability, and safety.
Aerospace Industry
Bolts serve very important applications in the aerospace industry, where safety and weight are considered very essential. Aerospace-grade bolts are widely used in airplane structure assembly, propulsion systems, and landing gears. The screws' strength and lightness impact plane performance and safety.
Automotive Industry
Bolts are widely used in many automotive parts ranging from the assembly of engines, suspension systems to body parts. They are crucial for securing wheels, brake components, and other systems. Specialized threads and shapes enable bolts to withstand the stresses of a vehicle's operation which ensure opt safety and durability.
Energy Sector
The energy sector relies on these bolts, particularly the oil, gas, and renewable energy technologies. High-strength wholesale bolts are used to secure pipelines, drilling equipment, wind turbines and other critical infrastructure. Bolts and fasteners designed for this industry are produced to resist extreme environmental and chemical exposure.
Technical of Bolt
Head Types: Different head types, including hexagonal, square, and cylindrical, serve distinct purposes and provide unique advantages concerning grip and tool compatibility.
Materials: Different materials provide distinct advantages concerning corrosion resistance, tensile strength, and cost-effectiveness. Stainless steel for corrosion resistance, carbon steel for strength and durability, and alloy steel for high-stress applications.
Threads: These are available in different thread types such as coarse, fine, and extra-fine, which are designed to provide better grip and reduce chances of stripping, especially in specific materials and applications.
Finish: Coatings and finishes like zinc plating, galvanization, and black oxide increase resistance to corrosion and oxidation and enhance the durability and aesthetic aspect of the bond in specific environments and applications.
How can you prevent bolts from loosening over time
Lock Nuts: Nylon-insert or distorted-thread lock nuts provide friction-based resistance to backing off.
Lock Washers: Split ring or toothed washers exert spring tension to maintain preload and resist rotation.
Thread-Locking Compounds: Anaerobic adhesives like Loctite bond the threads and cure in the absence of oxygen, creating a secure, removable (or permanent) lock.
Double Nutting: Using two nuts tightened against each other can help jam the assembly and prevent rotation.
Regular Maintenance: Scheduled inspections and retightening help detect early signs of loosening, wear, or fatigue before failure occurs.
Design Considerations: Using longer bolts, increasing clamp length, or incorporating safety wire or tab washers in high-vibration environments enhances reliability.
Install of Bolt
Preparation: Gather and prepare all required tools like wrenches, spanners, torque wrenches, and required washers and nuts.
Alignment: Align the bolt holes on the two objects being fastened to ensure proper installation and minimal stress on the bolt.
Insertion: Insert the bolt through the aligned holes, ensuring the correct orientation regarding the head type and load direction.
Nut and Washer Placement: Place a washer on either side of the bolt, if required, and a nut on one side, ensuring proper fit and tightness.
Tightening: Tighten the nut using a wrench or spanner, then gradually apply torque using a torque wrench to achieve the required torque specifications.
Torque Maintenance: Reseat the torque specs after installation to ensure long-term stability and prevent issues like loosening or failure under load.
Maintenance And Repair
Regular Inspections
Perform periodic inspections to detect any signs of damage, wear, or corrosion, ensuring timely maintenance and replacement, particularly in critical applications.
01
Corrosion Prevention
Apply appropriate anti-corrosion measures such as coatings, greasing, or painting, based on the environment to maintain fastener integrity and prolong lifespan.
02
Torque Checks
Regular torque checks after heavy use help identify early loosening and prevents potential failures during critical operations.
03
Cleaning
Clean bolts and their corresponding nuts and washers to eliminate dirt, debris, and corrosion that might hinder proper function; this also helps identify wear for potential replacement.
04
Replacement
Initiate an immediate replacement after detecting any significantly worn bolts to keep safety and performance minimally affected in continuous operations.
05
Certificates
FAQ
As one of the most professional bolt manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy high-grade bolt at competitive price from our factory.
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