Professional Fastener Solutions Since 2007
Ruian Longcang Standard Parts Co., Ltd. is your trusted partner for high-quality washers and fasteners. With over 15 years of manufacturing excellence, we deliver precision-engineered solutions for construction, mining, heavy machinery, and automotive industries worldwide.
Global Certification
ISO 9001, IATF 16949 Certified
Massive Stock Inventory
Over 500 specifications in stock
Custom Manufacturing
Custom materials, dimensions & coatings
Factory Direct Pricing
Eliminate middlemen, more competitive
Select Your Spring Washers by Type/Standard
DIN 127B - Standard Split Spring Washer
Standard: DIN 127B
Material: Carbon Steel, Stainless Steel
Size Range: M3 - M64
Surface: Zinc Plated, Passivated
DIN 7980 - High-Strength Lock Spring Washer
Standard: DIN 7980
Material: Hardened Steel
Size Range: M4 - M39
Hardness: HRC 44-51
ASME B18.21.1 - Imperial Spring Washer
Standard: ASME B18.21.1
Material: Carbon Steel, SS316
Size Range: #4 - 3"
Finish: Plain, Zinc, Hot-Dip Galvanized
Wave Spring Washer
Type: Wave Form
Material: Spring Steel, Stainless Steel
Size Range: M5 - M100
Application: Bearing Preload, Vibration Damping
Saddle Spring Washer
Type: Saddle Form
Material: Phosphor Bronze, Spring Steel
Size Range: M6 - M48
Feature: High Load Capacity
View All Types
Explore our complete range of spring washers and fastening solutions
Can't find what you're looking for? We specialize in custom solutions.
We're Not Just Suppliers, We're Your Fastening Solution Partners
With over 15 years of manufacturing excellence, Longcang delivers precision-engineered fasteners that meet the most demanding industrial requirements.
Advanced Manufacturing Capability
Equipped with fully automated forming and heat treatment production lines, producing over 2 billion pieces annually with consistent precision and reliability.
Rigorous Quality Control
Our facility features hardness testers, salt spray testing machines, and torque testing equipment to ensure every batch meets international standards and performance consistency.
Material Science Expertise
Deep expertise in carbon steel, stainless steel (304/316), phosphor bronze, and other specialized materials, ensuring optimal performance for your specific applications.
Comprehensive Technical Support
From product selection to installation guidance, our engineering team provides professional consultation and support throughout your entire project lifecycle.
From Consultation to Delivery, We Simplify Every Step
Our transparent and efficient process ensures seamless collaboration from initial inquiry to final delivery.
Requirements Analysis & Product Selection
Our experts analyze your specific needs and recommend the optimal fastener solutions for your applications.
Solution Confirmation & Quotation
We provide detailed technical specifications, competitive pricing, and delivery timelines for your approval.
Precision Manufacturing & Quality Testing
Advanced production lines and rigorous quality control ensure every product meets your exact specifications.
Global Shipping & After-sales Support
Reliable worldwide delivery with comprehensive after-sales support to ensure your complete satisfaction.
Our Products Are Widely Applied Across Key Industries
With over 15 years of manufacturing expertise, Longcang's high-quality washers and fasteners serve critical applications across diverse industrial sectors worldwide.
Automotive Manufacturing
Critical fastening solutions for automotive assembly lines, engine components, and safety systems requiring precise specifications and durability.
Aerospace Industry
High-strength washers and fasteners meeting stringent aerospace standards for aircraft manufacturing and maintenance applications.
Energy Equipment
Reliable fastening components for wind turbines, solar panels, and power generation equipment operating in harsh environments.
Construction Machinery
Heavy-duty washers and fasteners for excavators, cranes, and construction equipment requiring maximum strength and reliability.
Electronics Manufacturing
Precision fasteners for electronic device assembly, telecommunications equipment, and consumer electronics production.
Railway Transportation
Safety-critical fastening solutions for railway infrastructure, rolling stock, and high-speed rail systems worldwide.
Trusted by Industry Leaders Worldwide
Our commitment to quality and precision has made us the preferred fastener supplier for major manufacturers across these critical industries.
Explore the Technical World of Spring Washers
Access comprehensive technical resources, expert guides, and professional insights to make informed decisions about spring washers and fastening solutions.
Technical Guides
Download comprehensive guides and specifications for optimal spring washer selection and application.
Expert Articles
In-depth technical articles covering material comparisons, installation techniques, and performance optimization.
Carbon Steel vs Stainless Steel: Performance Comparison
Comprehensive analysis of material properties, corrosion resistance, and application suitability.
How to Properly Install Spring Washers for Maximum Anti-Loosening Effect
Step-by-step guide to achieve optimal fastening performance and prevent loosening.
Industry-Specific Applications and Requirements
Tailored solutions for automotive, construction, and heavy machinery industries.
Frequently Asked Questions
Spring washers provide anti-loosening properties through their split design and spring tension, while flat washers primarily distribute load and protect surfaces. Spring washers are ideal for applications where vibration resistance is crucial, such as automotive and machinery assemblies.
Material selection depends on environmental conditions, load requirements, and corrosion resistance needs. Carbon steel offers high strength for general applications, while stainless steel provides superior corrosion resistance for harsh environments. Our technical team can help you select the optimal material based on your specific requirements.
Our spring washers comply with international standards including ISO, DIN, ANSI, and JIS. We maintain strict quality control throughout the manufacturing process and provide certification documentation for all products. Our facility is equipped with precision testing equipment to ensure consistent quality.
Yes, we specialize in OEM and custom production. Our experienced engineering team can develop tailored solutions based on your specific dimensions, materials, surface treatments, and performance requirements. We work closely with clients from design to delivery to ensure optimal results.
Lead times vary depending on order quantity and customization requirements. Standard products typically ship within 7-14 days, while custom solutions may require 2-4 weeks. We maintain inventory of common specifications to ensure fast delivery for urgent requirements.
Still have questions? Our technical experts are here to help.
Contact Technical SupportTransparent Production Process, Visible Excellence Quality
Take a virtual tour of our state-of-the-art manufacturing facility in Ruian, Zhejiang. See firsthand how we maintain the highest quality standards through advanced equipment and rigorous testing procedures.
Modern Manufacturing Facility
Our 15,000 square meter facility in Ruian Industrial Zone, equipped with advanced infrastructure and environmental controls to ensure optimal production conditions.
Premium Raw Material Storage
Climate-controlled warehouse storing high-grade steel and alloy materials from certified suppliers, ensuring consistent quality from the source.
Advanced Automated Production Lines
Our production floor features cutting-edge CNC machines, automated stamping equipment, and precision forming tools that ensure consistent quality and high efficiency in manufacturing washers and fasteners.
CNC Precision Machining
±0.01mm tolerance accuracy
High-Speed Stamping
500+ pieces per minute capacity
Automated Quality Control
Real-time monitoring systems
State-of-the-Art Quality Testing Laboratory
Our comprehensive testing facility ensures every product meets international standards through rigorous quality control procedures.
Hardness Testing
Rockwell and Vickers hardness testing to ensure material strength meets specifications for high-stress applications.
Salt Spray Testing
Corrosion resistance testing in controlled salt spray environment to validate coating durability and longevity.
Precision Measurement
Coordinate measuring machines and optical comparators ensure dimensional accuracy to customer specifications.
Experience Our Quality Firsthand
Schedule a virtual or in-person factory tour to see our manufacturing excellence and quality control processes in action.
Get Your Free Quote and Samples Now
Tell us about your project requirements, and our fastener experts will provide you with a detailed quote and solution within 24 hours.
