Double Stack Self-Locking Washer
The Double Stack Self-Locking Washer is an advanced fastening solution designed to prevent loosening under vibration, shock, or dynamic loads. With a unique serrated surface and paired design, this washer ensures secure locking without additional adhesives or re-tightening. It is widely applied in automotive, aerospace, heavy machinery, wind power, and bridge construction projects, where safety and reliability are critical.
Production Process of Double Stack Self-Locking Washer
At Weforging, every Double Stack Self-Locking Washer is produced through a precise, multi-step process that ensures performance, strength, and durability.
Material Preparation – Premium alloy steel wire or billet is selected for its strength, ductility, and wear resistance. The material undergoes strict inspection before processing.
Cold Forging – Using high-pressure cold forging, each washer is shaped with accurate geometry and uniform grain flow, improving mechanical integrity and dimensional precision.
CNC Machining – The serrated contact surfaces are precisely machined and matched to guarantee perfect interlocking between the upper and lower washers.
Heat Treatment – Controlled quenching and tempering enhance hardness and resilience, ensuring stable locking performance even under vibration or repeated loading.
Surface Treatment – Protective coatings such as phosphating or Dacromet are applied to increase corrosion resistance and smooth assembly operation.
Inspection and Testing – Every washer pair is verified through torque, dimensional, and anti-loosening tests to confirm consistent quality and reliable performance.
Advantages of Double Stack Self-Locking Washer
Weforging’s Double Stack Self-Locking Washer combines advanced cold forging, CNC precision machining, and surface treatment to deliver exceptional fastening performance. Its dual serrated design forms a firm frictional grip, keeping joints stable under vibration and load variation. Cold forging refines the metal grain flow, improving overall strength and dimensional accuracy, while precision machining ensures perfect serration alignment and smooth locking action. In addition, phosphating or Dacromet coatings provide excellent corrosion protection and easy assembly. Through the balance of structural strength, surface integrity, and precision engineering, each washer achieves reliable performance and long service life across mechanical, automotive, and marine applications.
Applications of Double Stack Self-Locking Washer
Weforging’s Double Stack Self-Locking Washers are engineered for high-vibration and precision fastening environments where stability and safety are essential.
Automotive Industry – Used in engine assemblies, suspension systems, and brake components to maintain secure fastening under constant motion.
Heavy Machinery & Construction Equipment – Ensures reliable joint stability in excavators, loaders, and hydraulic systems subjected to repeated impact.
Wind Energy & Power Systems – Used in turbine hubs and generator mounts where anti-loosening performance is vital for safety and efficiency.
Marine & Offshore Engineering – Protects critical joints in pumps, gearboxes, and deck structures operating in corrosive seawater environments.
Industrial Equipment & Automation – Maintains precise tension in robotic arms, presses, and assembly lines that require continuous movement and accuracy.
Why Choose Weforging?
Weforging offers a complete in-house manufacturing process that integrates hot forging, CNC machining, and heat treatment under strict quality control. Each production stage is verified through ultrasonic, magnetic particle, hardness, and fatigue testing in Weforging’s certified laboratory to ensure consistent excellence. With extensive global supply experience, Weforging proudly serves leading companies such as MTU, Mayer & Cie, Columbia Gear, SANY, and XCMG. Our engineering team also provides flexible OEM and ODM customization services, delivering optimized solutions that meet diverse load capacities and application requirements with precision and reliability.
Contact
Looking for reliable anti-loosening fastening solutions? Partner with Weforging today and request a free quote. Our forged and CNC-machined components are trusted by global OEMs for their strength, precision, and long-term performance.
