65mn Black Oxide Washer DIN25201 Metal Lock Washer Self Locking Anti Vibration Factory Direct Full Range in Stock

• Customization: Available
• Type: Lock Washer
• Material: 65mn Spring Steel
• Model NO.: DIN25201
• Combination Washer Structure: A Type
• Combination Washer Packaging: All Inclusive
• Spring Washer Type: Standard
• Surface Treatment: Black Oxide Coated
• Hardness Grade: 12.9 Grade / HRC 45-48
• Salt Spray Test Duration: 500+ Hours
• OEM: Available
• Application: Used in Between The Nut and Bolt.
• Transport Package: Carton+Pallet
• Specification: M3-M80 ss & sp
• Trademark: RUIQIN
• Origin: China
• HS Code: 7318150000
• Production Capacity: 200000000PCS/Year
• Package Size: 20.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 5.000kg

Product Description

Product Description

We usually use glue to bond the wide-tooth surfaces into a pair, making installation easier and improving efficiency.

DIN25201 double-layer self-locking washer is a high-performance anti-loosening washer, consisting of two interlocking parts. It adopts the wedge-locking principle and multi-tooth surface engagement design, effectively preventing bolts from loosening under high vibration and dynamic loads. Its unique double-layer design not only enhances connection strength but also ensures long-term stability in extreme environments. It is widely used in fields requiring high safety and reliability, such as railways, wind energy, heavy machinery, automobile manufacturing, and construction engineering.
 

Black Oxide Coating Characteristics

65Mn Spring Steel Characteristics

The black oxide coating provides excellent corrosion resistance, wear protection, and reduced friction, ensuring longer service life and reliable performance in high-stress environments. It also maintains the washer's original dimensions, offering precise fit and stability. Additionally, the matte black finish enhances the aesthetic appeal of mechanical assemblies while being a cost-effective solution for industrial applications.

65Mn is a high-carbon manganese spring steel characterized by its high strength, hardness, and excellent elasticity. After heat treatment, it demonstrates outstanding fatigue resistance and wear resistance, maintaining performance under high stress and repeated impacts. It is widely used in spring washers, Belleville washers, and various mechanical spring components.

Other materials and finishes are available	merit
65Mn + Dacromet	Superior corrosion resistance and high-strength performance.
65Mn + Black Oxide	Enhanced wear resistance and anti-corrosion properties.
Stainless steel 316 + Natural Polishing	Excellent rust protection with a clean, bright finish.
Stainless steel 304 + Natural Polishing	Highly corrosion-resistant, ideal for harsh environments.

Specification

Product Applications

Key Application Features

1. Excellent Anti-Loosening Performance
Features a wedge-locking design and multi-tooth surface engagement, effectively preventing bolt loosening under high vibration and dynamic loads.
2. Adaptability to Extreme Environments
Maintains stable fastening performance in high temperatures, humidity, and corrosive environments.
3. Efficient Installation and Reusability
Pre-bonded wide-tooth surfaces enhance installation efficiency and support multiple reuses without performance loss.
4. Wide Range of Applications
Ideal for high-standard applications in railways, wind energy, heavy machinery, automotive manufacturing, and construction engineering.

Railway Industry

Equipment: Track connections, locomotive chassis, railway tie fixing, train connections

Application: Double-layer self-locking washers are used to ensure fastening connections do not loosen under high-speed operation and frequent vibrations, enhancing safety and stability.

Wind Energy Sector

Equipment: Wind turbine blades, tower bolts, foundation connectors

Application: Double-layer self-locking washers are used at the connection points of wind energy equipment to prevent loosening in high-wind and vibrating environments, ensuring long-term stable operation.

Heavy Machinery

Equipment: Excavators, loaders, cranes, rollers

Application: Double-layer self-locking washers are used to prevent loosening of fasteners under high impact and heavy load in heavy machinery, ensuring operational stability and safety.

Automotive Manufacturing

Equipment: Engine systems, suspension systems, chassis connections, brake systems

Application: Double-layer self-locking washers are widely used for fastening critical automotive components, ensuring secure connections under high-speed driving and intense vibrations.

Packaging & Shipping

Minimum Unit Packaging

Inventory and Quick Delivery

Secure Carton Packaging

Our minimum unit packaging consists of plastic bags, with different quantities based on the washer size and specifications. Commonly, each bag contains 1000, 500, or 200 pieces, ensuring easy handling and efficient storage.

We maintain a reliable inventory of all sizes and materials of our products, ensuring fast delivery for in-stock items. Our commitment to sufficient stock levels allows us to support immediate shipment to meet your urgent needs efficiently.

The plastic bags are placed inside sturdy cartons, securely sealed with tape and zip ties to prevent movement and damage during transportation, ensuring your products arrive safely and in perfect condition.

Pallet Packaging and Protection

Container Loading

Shipping Methods

The cartons are neatly stacked on pallets, secured with zip ties and reinforced with wooden edge protectors for added stability. Finally, the entire pallet is wrapped with stretch film to ensure safe and damage-free transportation.

Pallets are systematically loaded into containers, ensuring maximum space utilization and secure placement. Our team follows strict loading procedures to prevent shifting during transit, guaranteeing that your products arrive safely and intact.

For large-volume orders, we arrange ocean freight to ensure cost-effective and reliable delivery. For small-sized orders, we offer express shipping for faster transit, meeting different customer needs with flexibility and efficiency.

Company Profile

Company Profile of RUIQIN Standard Parts

   Founded over 20 years ago, Ruiqin Standard Parts has grown into a leading manufacturer of high-quality washers and fasteners. Located in the heart of China's automotive parts industrial hub, we leverage local advantages for cost control and technological optimization. With a strong production and delivery capability, we ensure reliable and timely supply to our global clients. Our products are widely exported to Europe, South America, and Southeast Asia, where they are trusted for their durability and precision. At Ruiqin, we are committed to providing exceptional quality and service, supporting your projects with efficient, cost-effective solutions.

Experienced Technical Team

Sufficient Inventory with Full Specifications and Materials

 Automated Production Lines for Rapid and Stable Output

Our team consists of highly skilled technicians with many years of industry experience, ensuring precision and reliability in every product. Their expertise enables us to meet complex requirements and deliver consistent quality across all orders.

We maintain a comprehensive inventory of washers in a wide range of specifications and materials, allowing us to support large orders and urgent demands. Our well-organized stock ensures quick dispatch and uninterrupted supply.

Equipped with advanced automated production lines, we achieve high efficiency and stable output, meeting tight deadlines while maintaining superior quality. Our modern manufacturing capabilities ensure reliability and scalability for global markets.

FAQ

issue	Reply
Can I customize the size, material, and surface treatment of the washers?	Yes, we offer full customization options, including size, material (65Mn, stainless steel, etc.), and surface treatment (Dacromet, zinc plating, etc.) to meet your specific requirements.
What is the typical lead time for bulk orders?	Our standard lead time is 15-30 days, depending on the order quantity and product specifications. We can also coordinate delivery schedules to match your project timeline.
Do you support small trial orders?	Yes, we accept small trial orders to help you test the quality and fit of our products before placing larger orders.
Which shipping methods do you provide?	We offer a range of shipping methods, including ocean freight for bulk orders and express delivery for smaller quantities.
Can you provide samples before placing an order?	Yes, we provide free samples, but the shipping cost is covered by the buyer.
What regions do you export to?	We mainly export to Europe, South America, and Southeast Asia, with strong experience in handling international logistics and customs procedures.
How do you ensure product quality?	We have a strict quality control system, including raw material inspection, in-process checks, and final product testing to ensure every item meets industry standards.
Is your packaging safe for international shipping?	Yes, our products are securely packed in plastic bags, cartons, and reinforced pallets, with additional wrapping to prevent damage during transit.
Can you help with custom labeling and packaging?	Yes, we offer custom labeling and packaging solutions to match your brand requirements.
What payment terms do you accept?	We support T/T, L/C, and other negotiable terms, and we are flexible to accommodate your financial arrangements.