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S21-3003050BB
HongPro
S21-3003050BB
This premium ball joint, model S21-3005050BB, is engineered to restore the safety and handling performance of your vehicle's suspension system. Crafted from high-grade, forged carbon steel and featuring a advanced zinc-nickel plating, it provides exceptional corrosion resistance, withstanding over 500 hours in salt spray tests.
Precision-machined for a perfect fit, it ensures optimal wheel alignment and responsive steering. The internal design incorporates a high-density polymer bearing and a reinforced dust boot for superior wear resistance and contamination protection, significantly extending service life. Rigorous quality controls, including fatigue testing exceeding 50,000 cycles and adherence to ISO 9001 standards, guarantee reliable performance under extreme loads and road conditions. This component is a direct, high-quality replacement, offering OEM-level durability and a secure, quiet ride. Trust in its robust construction for long-lasting suspension integrity.
Our ball joint undergoes a specialized zinc-nickel plating process, providing exceptional protection against rust and corrosion. This coating has been proven to withstand over 500 hours of salt spray testing (ASTM B117), significantly outperforming standard zinc plating. This ensures the joint remains free from seizure and maintains structural integrity even in harsh, wet, or winter road conditions, guaranteeing reliable performance and a longer service life.
Constructed from high-grade, forged carbon steel, this ball joint offers an exceptional strength-to-weight ratio. The forging process aligns the metal's grain structure, creating a component that can handle extreme dynamic loads and impact stresses without failure. Rigorous fatigue testing exceeding 50,000 cycles under high load conditions confirms its reliability, ensuring it provides a safe and secure connection for the vehicle's suspension system over the long term.
Every ball joint is precision-machined to OEM-level tolerances, guaranteeing a perfect fit and seamless installation without modifications. The internal design incorporates a high-density, self-lubricating polymer bearing and a reinforced rubber dust boot. This combination minimizes friction, prevents noise (squeaks and knocks), and effectively seals out dirt, grime, and moisture, which are primary causes of premature wear and joint failure.
We operate a fully certified ISO 9001:2015 quality management system, ensuring every production batch meets the highest standards of consistency and reliability. Each ball joint undergoes multiple inspections, including dimensional checks, torque tests, and rotational force analysis. This commitment to certified quality control provides you with the confidence that you are installing a part built to perform reliably and safely.
| Category | Specification | Details & Standards |
| Part Number | S21-3003050BB | - |
| Product Type | Lower Suspension Ball Joint | - |
| Material | Forged Carbon Steel | Grade: 10C or equivalent for high tensile strength. |
| Surface Treatment | Zinc-Nickel Plating | Corrosion resistance: >500 hours Neutral Salt Spray Test (ASTM B117). |
| Thread Size | M12 x 1.25 | Precision rolled threads for consistent torque application. |
| Ball Stud Diameter | 16.0 mm | Manufactured to a tolerance of ±0.05mm. |
| Ball Stud Hardness | 55-62 HRC | Ensures exceptional wear resistance and load-bearing capacity. |
| Dust Boot Material | Synthetic Rubber (NBR) | Resistant to ozone, temperature extremes (-40°C to +100°C), and road chemicals. |
| Torque Spec (Nut) | 65 - 85 N·m | (48 - 63 ft-lbs) |
| Taper Fit | Standard Automotive Taper | Ensures a secure fit into the steering knuckle. |
| Fatigue Life | >50,000 Cycles | Tested under dynamic load conditions simulating severe road surfaces. |
| Quality Standards | ISO 9001:2015 | All manufacturing processes are certified under a Quality Management System. |
Here are specific application scenarios of Ball Joint:
This ball joint is perfect for vehicles subjected to daily stop-and-go traffic and frequent encounters with potholes, speed bumps, and road imperfections. The precision fit and high-density polymer bearing ensure smooth, responsive steering and quiet operation, eliminating annoying squeaks and knocks. Its corrosion-resistant zinc-nickel plating, tested for over 500 hours against salt spray, provides long-term protection against rust caused by road de-icing salts and urban pollutants, guaranteeing dependable performance mile after mile.
Engineered for durability on poorly maintained roads, rural paths, or lightly unpaved surfaces, this component excels under stress. The forged carbon steel construction and a fatigue life tested beyond 50,000 cycles allow it to withstand repeated impacts and shocks. The reinforced dust boot effectively seals out dirt, gravel, and moisture, preventing abrasive contamination that leads to premature failure. This ensures suspension stability and safety even when road quality is compromised.
As a direct OEM-spec replacement, this ball joint is the top choice for professional workshops and DIYers performing suspension overhauls or addressing specific wear symptoms like uneven tire wear or vague steering. Its precision machining guarantees a perfect fit, enabling a swift and hassle-free installation without modification. By restoring the original geometry and load-bearing capacity, it ensures proper wheel alignment, enhances vehicle safety, and provides a long-lasting, reliable repair solution.
The ball joint is a critical safety component in the suspension system. Its high hardness rating (55-62 HRC) on the ball stud and robust design maintain a firm connection between the steering knuckle and control arm. This is vital for precise wheel control, stability during cornering, and effective braking. Installing this high-quality part directly contributes to maintaining the vehicle's original handling characteristics and safety margins, giving drivers confidence and peace of mind.
For your safety and to ensure optimal performance, please adhere to the following guidelines. Always consult a professional mechanic if you are unsure about any step.
Before installation, safely support the vehicle with jack stands. Thoroughly clean the mounting area in the control arm and steering knuckle. Use a torque wrench to tighten the new ball joint's retaining nut to the specified value of 65-85 N·m. Always install a new cotter pin. Finally, a professional wheel alignment is strongly recommended to restore factory handling and prevent premature tire wear. Never use an impact wrench for final tightening, as it can damage the component.
