Your Professional Air Suspension Parts Supplier
Our goal is to become your true partner in the field of air suspension China. Shandong Paisen Machinery Manufacturing Co., Ltd. is a leading manufacturer specializing in high-precision mechanical parts, hydraulic components, and industrial machinery equipment. We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.
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Suspension Mounting BracketEngineered for maximum load-bearing capacity, our Suspension Mounting Bracket provides critical structural support for air and mechanical suspension systems. Precision-fabricated from high-tensile steel, this component ensures proper...view more
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Hex Lock NutEngineered for maximum security in high-vibration environments, our Heavy-Duty Hex Lock Nut ensures critical fasteners stay securely tightened, even under extreme loads. Manufactured from high-grade alloy steel and featuring...view more
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L Stop PlateEngineered for superior load security and structural integrity, our L-Stop Plate is a critical reinforcement component for semi-trailer suspension and axle systems. Made from high-tensile steel, this precision-formed plate prevents...view more
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Hex Head BoltDesigned for maximum strength and reliability, our Heavy-Duty Hex Head Bolt is engineered to withstand the toughest conditions in commercial trucking. Manufactured from high-tensile alloy steel, these bolts provide superior clamping...view more
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Shock Absorber BoltEngineered to withstand extreme vibration and dynamic loads, our Shock Absorber Bolt is precision-crafted for optimal performance in heavy-duty trailer applications. Manufactured from heat-treated alloy steel, this critical fastener...view more
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Fifth Wheel Shim PlateEngineered for precision fifth wheel alignment, our Shim Plate System eliminates uneven wear and improves tractor-trailer coupling performance. CNC-machined from high-grade alloy steel, these laser-verified shims provide...view more
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Shock Absorber WasherPrecision-engineered for vibration-intensive applications, our Shock Absorber Washer delivers unmatched durability in trailer suspension systems. Manufactured from heat-treated chromium steel, this critical component ensures proper load...view more
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Axle Shock AbsorberEngineered for superior vibration control, our Axle Shock Absorber delivers unmatched damping performance in heavy-haul applications. Utilizing nitrogen-charged twin-tube technology, this premium shock maintains consistent stability...view more
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Leaf Spring Guide PlateThe Leaf Spring Guide Plate is a critical suspension component designed to maintain precise alignment and stability of leaf springs in heavy-duty semi-trailers. Manufactured from high-grade steel or reinforced alloys, this guide plate...view more
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Air Spring U-bolt AssemblyEngineered for maximum clamping security in air suspension systems, our Air Spring U-Bolt Assembly provides vibration-resistant mounting for critical load-bearing components. CNC-formed from high-tensile alloy steel, this complete kit...view more
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Air SpringThe Air Spring (also known as an airbag or pneumatic suspension spring) is a vital component in modern semi-trailer suspension systems. Designed to replace traditional steel springs, it uses compressed air to absorb road shocks,...view more
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Air Chamber Base Plate BoltEngineered for critical brake system security, our Air Chamber Base Plate Bolt provides fail-fast fastening for commercial trailer brake chambers. Manufactured from heat-treated alloy steel, this specialized bolt maintains precise...view more
Why Choose Us
Customized Solutions
We understand that every client's needs are different, so we offer customized services. Our engineers will assist you in selecting suitable components based on your specific requirements and tailor-made design solutions according to your unique operational needs.
Production Equipment
Our company has 2 laser cutting machines, 8 stamping machines, 12 CO2 welding machines, 2 sawing machines, 1 CNC milling machine, 2 automatic welding machines, 2 welding robots, and 1 spray painting production line.
Quality Control
Our company strictly controls product quality, with rigorous inspection procedures. We use spectrometers, coordinate measuring machines, and pressure tests to ensure the durability and performance of our products.
Production Market
Our products are well-received in the market and are exported to North America, the Middle East, South Africa, and other countries and regions.

The air suspension parts produced by our company mainly include the following types:
Suspension Mounting Bracket
Engineered for maximum load-bearing capacity, our suspension mounting bracket provides critical structural support for air and mechanical suspension systems. Precision-fabricated from high-tensile steel, this component ensures proper axle alignment while withstanding extreme stress and vibration.
Hex Lock Nut
Engineered for maximum security in high-vibration environments, our heavy-duty hex lock nut ensures critical fasteners stay securely tightened, even under extreme loads. Manufactured from high-grade alloy steel and featuring a self-locking nylon insert, this nut prevents loosening caused by road shocks, trailer flex, and temperature fluctuations.
Advantages of Air Suspension Parts
Suspension Mounting Bracket
Suspension mounting bracket have many advantages, including:
Increased safety: They ensure the suspension system functions correctly, which helps the tires maintain contact with the road, crucial for traction and braking efficiency, especially during turns.
Component protection: The vibration-damping function helps protect other vehicle parts from damage caused by road impacts and excessive movement.
Enhanced stability and control: They connect the suspension to the vehicle's frame, providing a stable point for components like shock absorbers and control arms, which is critical for proper handling and stability.
Improved ride comfort: By absorbing and damping shocks and vibrations, these brackets contribute to a smoother and more comfortable ride for passengers.
Hex Lock Nut
Hex lock nut have many advantages, including:
Enhance the reliability of bolted connections: By preventing loosening, they can significantly reduce maintenance costs associated with frequent inspections and replacements. Furthermore, using these lock nuts contributes to overall safety in mechanical assemblies, as they help to avoid the risk of component failure.
Installation straightforward: Their compatibility with standard tools adds to their convenience in various settings, making them a preferred choice for technicians and engineers alike.
Suspension Mounting Bracket
Suspension mounting bracket can be used for a variety of purposes, including:
Holding electrical enclosures: Can be used with hooks or screws to mount enclosures with panels.
Audio and visual: Used to hang loudspeakers from a single point for a level suspension.
Vehicle suspension: Mounts shock absorbers, control arms, and springs to the vehicle's chassis.
Industrial and electrical: Used to suspend float switches, probes, and transducers in tanks and basins.
Hex Lock Nut
Hex lock nut can be used for a variety of purposes, including: Hexagon lock nuts are utilized in a multitude of industries, including automotive, aerospace, construction, and machinery. In the automotive sector, for instance, these nuts secure critical components such as wheels and engine parts, where failure could have disastrous consequences.

Specification of Suspension Mounting Bracket
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Material |
ASTM A572 Grade 50 Steel |
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Thickness |
1/2" (12.7mm) reinforced |
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Finish |
Powder-coated or galvanized |
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Hole Patterns |
SAE & Metric compatible |
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Load Rating |
25,000 lbs static load |
Features of American Style Axle
Structural integrity
3/8" gusset reinforcement at stress points. Laser-cut mounting surfaces (±0.5mm tolerance). Pre-welded nut plates for easy assembly.
Vibration control
Harmonic dampening design. Isolator pad compatibility. Anti-resonance geometry.
Corrosion protection
2000-hour salt spray resistance. Self-healing coating technology. UV-stable markings.
Specification of Hex Lock Nut
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Thread Sizes |
M12-M30 / 1/2"-1-1/4" |
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Torque Retention |
90% after 50,000 vibration cycles |
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Tensile Strength |
150,000 psi (min) |
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Finish Options |
Zinc-plated, black oxide, or stainless steel |
Features of Hex Lock Nut
Secure locking mechanism
Nylon-insert technology maintains constant torque retention. Distortion-resistant design prevents thread deformation. Pre-applied thread locker for immediate vibration resistance.
High-strength construction
Grade 10 alloy steel (sae j995 / din 934). Heat-treated for hardness (rockwell c 32-39). Zinc-nickel plating (ISO 4042 compliant).
Easy installation & maintenance
Standard hex profile (wrench-friendly). Reusable up to 5 times without performance loss. Color-coded sizing for quick identification.
Packing and Shipping of Air Suspension Parts
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Packing |
Tray |
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Shipping |
Shipped by road, sea, rail |
We're well-known as one of the leading air suspension parts manufacturers and suppliers in China. Our factory offers high quality air suspension parts made in China with competitive price. Welcome to contact us for quotation.
1 2 hex screw, m4x20mm, m6 x 30mm hex bolt
