A double-stacked self-locking washer is a special mechanical connector designed to prevent bolts from loosening, especially in high-vibration or high-load environments.It consists of two spring washers nested inside each other in an S-shaped configuration. The outer spring washer has ends that bend inwards, while the inner spring washer has ends that bend outwards, creating a two-way self-locking feature.The working principle of this washer is based on elastic deformation. When placed between connecting parts, the inner curved part of the outer spring ring interlocks with the outer curved part of the inner spring ring, creating a locking force that prevents the connecting parts from loosening under vibration or load.The advantages of the double-stacked self-locking washer include high reliability, easy installation, and a wide range of applications.It is suitable for various mechanical connections, such as threaded connections and pin connections, and is widely used in industrial production and machinery manufacturing, especially in the automotive manufacturing process, where it is often used to connect engine and chassis systems to improve the safety and reliability of the car.
| Standard | ASME B 18.2.1, IFI149,DIN931, DIN933, DIN558, DIN960, DIN961, DIN558, ISO4014, DIN912 and etc. |
| Product name | Double layered self-locking washer Stainless steel Double disc self-locking washer |
| Size | standard & non-standard, spport customized |
| Material | Carbon Steel, Alloy Steel, Stainless Steel, Brass and etc. |
| Grade | SAE J429 Gr.2, 5,8; ASTM A307Gr.A, Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 and etc. |
| Thread | UNC,UNF |
| Finish | Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G and etc. |
| Packing | Bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand |
| Application | Structural Steel; Metal Buliding; Oil&Gas; Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating and etc. |
| Test Equipments | Desktop direct- reading spectrometer, cutting machine, automatic pre- milling machine, polishing machin, hard-testing gauge(Vickers), metallography microscope, electrolytic thickness gauge, tensile testing machine, salt spray device, magnetic detection machine(magnetic particle flaw detector), Caliper, Go&No-go gauge and etc. |
| Supply Ability | 2000 tons per month |
| MinimumOrder | Not limited |
| Trade Term | FOB/CIF/CFR/CNF/EXW/DDU/DDP |
| Payment | T/T, L/C , D/A , D/P , Western Union ,MoneyGram ,etc |
| Market | South&north Amrica/Europe/East&South east Asia/ Australia and Africa etc. |
| Our advantage | One-stop shopping;High quality; Competitive price; Timely delivery; Technical support; Supply Material and Test Reports; |
| Notice | Please lets know the Size, quantity, Material or Grade, surface, If it is special and Non-standard products, please supply the Drawing or Photos or Samples to us |
A double-stacked self-locking washer is a special mechanical connector designed to prevent bolts from loosening, especially in high-vibration or high-load environments.It consists of two spring washers nested inside each other in an S-shaped configuration. The outer spring washer has ends that bend inwards, while the inner spring washer has ends that bend outwards, creating a two-way self-locking feature.The working principle of this washer is based on elastic deformation. When placed between connecting parts, the inner curved part of the outer spring ring interlocks with the outer curved part of the inner spring ring, creating a locking force that prevents the connecting parts from loosening under vibration or load.The advantages of the double-stacked self-locking washer include high reliability, easy installation, and a wide range of applications.It is suitable for various mechanical connections, such as threaded connections and pin connections, and is widely used in industrial production and machinery manufacturing, especially in the automotive manufacturing process, where it is often used to connect engine and chassis systems to improve the safety and reliability of the car.
The design principle of the double-stacked self-locking washer includes a fine design of raised and grooved surfaces and a double-layer design, so that when the washer is subjected to external forces, the raised and grooved surfaces inside can engage more closely to ensure that it does not become loose.This design not only provides additional safety and stability, but also ensures that the bolt is securely fixed in place even under extreme conditions.In addition, the installation and maintenance of the double-stacked self-locking washer is relatively simple, and no additional tools or equipment are required. You only need to ensure that there is no foreign matter or dirt between the washer and the connection to prevent it from affecting its locking effect, and regularly check the condition of the washer. If it is damaged or deformed, it should be replaced in time.
In short, the double-stack self-locking washer provides an efficient and reliable fastening solution for various mechanical connections through its unique design and working principle. This is especially true in situations where it is necessary to prevent loosening of the connection parts due to vibration or high loads. The value and importance of its application is self-evident.
A double-stacked self-locking washer, also known as an anti-loosening washer or self-locking washer, is a special type of washer that is mainly used to prevent nuts or bolts from loosening in a vibrating environment.The main standard for them is DIN 25201, which specifies the dimensions, materials and performance requirements for double-lock washers in detail.
The dimensions of double-stacked self-locking washers mainly include the following:
● Diameter: usually between 1.2mm and 30mm, with specific specifications such as 3.5 medium, 4 medium, 5 medium, Ф6, Ф8, Ф10, 12 medium, 14 medium, 16 medium, 18 medium, 20 medium, 22 medium, 24 medium, 27 medium, 30 medium, 33 medium and 36 medium.
● Thickness: generally 0.3mm to 2.0mm.
● Clamping range: generally 1 to 1.5 times the diameter.
● Ejector pin height: generally 0.15 to 0.25 times the diameter.
The material of the double-fold self-locking washer is usually carbon steel or stainless steel, and the specific material can be selected according to the operating environment and requirements.Performance requirements include:
● Hardness: The hardness range should be between HRC28 and HRC48.
● Wear resistance: Wear resistance should meet the requirements of the standard, generally requiring a friction coefficient of less than 0.1.
● Tensile strength: The tensile strength should not be less than 400MPa.
● Elasticity: It should have good elasticity, be able to fasten to the bolt and generate a certain preload.
● Corrosion resistance: It should have good corrosion resistance and be able to adapt to various environmental conditions.
The working principle of the double-fold self-locking washer is that two independent washers are bonded together in pairs, and the tension between the two washers is used to achieve the dual effect of anti-loosening and tightening.These washers are suitable for use in the mechanical and construction sectors, especially where nuts or bolts need to be prevented from loosening, such as in the fixing of water pumps, connections on high-speed trains and aircraft, etc.
A double-stacked self-locking washer is an important fastening component with a high level of safety. It is widely used in many fields to ensure that components are securely fastened and will not come loose.
The main uses of double-stacked self-locking washers include:
1.Mechanical equipment: They are often used in mechanical equipment to ensure that the bolt connections are tight and secure.
2.Automotive industry: used in the automotive industry for connecting engine, chassis, transmission and other components.
3.Aerospace industry: Due to their high strength and anti-loosening properties, they are the first choice for bolted joints in the aerospace industry.
4.Petrochemical industry: used in the connections of petrochemical plants and pipelines to ensure sealing and safe operation.
5.Construction engineering: used as fasteners in building structures, such as the connection of steel beams and columns.
In addition, the double-stack self-locking washer offers the following advantages:
● Simple structure: Composed of two elastic washers and a metal ring, it is easy to install and use.
● Effective anti-loosening: Due to their elastic deformation, they fill the gaps between the threads, increasing friction and preventing the bolt and nut from loosening.
● Reusable: With a self-locking function, they will not come loose even when subjected to vibration or impact.
The application of double-stacked self-locking washers not only improves production efficiency and product quality, but also reduces the risk of equipment damage and personal injury.It is therefore widely used in industrial production and machinery manufacturing.
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Standard GB, DIN, ISO, JIS Size M3-M50 or non-standard as request&design Material Carbon steel, stainless steel, alloys steel etc. Hex head bolt and nut Grade 4.8 / 6.8 / 8.8 / 10.9 / 12.9 , A2-70 / A4-80 Packing Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Standard GB, DIN, ISO, JIS Size M3-M50 or non-standard as request&design Material Carbon steel, stainless steel, alloys steel etc. Hex head bolt and nut Grade 4.8 / 6.8 / 8.8 / 10.9 / 12.9 , A2-70 / A4-80 Packing Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Material 1.StainlessSteel:SS201,SS303,SS304,SS316,SS410,SS420 2.Steel:C45(K1045), C46(K1046),C20 3.Carbon Steel: 1010,1035,1045 4.Aluminum or Aluminum Alloy:Al6061,Al6063,Al7075,etc 5.Brass:H59,H62,Copper,Bronze Grade SAE J429 Gr.2, 5,8; ASTM A307Gr.A,A193 B7,B8,B8M,A194 2H, Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 and etc. Finish Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G and etc. Thread UNC,UNF,UEF,UN,UNS Standard ISO, DIN, ANSI, JIS, BS and Non-standard Sample Service Samples are all in free. Certificate ISO9001,CE, SGS, BV Advantage 1. Competitive price; 2. OEM service available Packing Bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand Lead Time 7-15 work days after order confirmed Application Structural Steel; Metal Buliding; Oil&Gas; Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating and etc. Notes Special specifications and marks can be made according to customers requirements;
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Standard GB, DIN, ISO, JIS Size M3-M50 or non-standard as request&design Material Carbon steel, stainless steel, alloys steel etc. Grade 4.8 / 6.8 / 8.8 / 10.9 / 12.9 , A2-70 / A4-80 Packing Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Standard GB, DIN, ISO, ASME,BSW Size M3-M50 or non-standard as request&design Material Carbon steel, stainless steel, alloys steel etc. Hex head bolt and nut Grade 4.8 / 8.8 / 10.9 / 12.9 , A2-70 / A4-80 Packing Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
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Standard GB, DIN, ISO, JIS Size M3-M50 or non-standard as request&design Material Carbon steel, stainless steel, alloys steel etc. Hex head bolt and nut Grade 4.8 / 6.8 / 8.8 / 10.9 / 12.9 , A2-70 / A4-80 Packing Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
