Triple Fold, Three Fold Disc Washer

Generally speaking, ordinary gaskets have been loosened after 300,000 times, while triple-stacked washers are still well maintained tight after 1,000,000 times.
Name： Triple stack disc washers NFE3L
Main material: 60Si2Mn.51CrV4
Surface treatment: Mechanical zinc plating, or coating treatment. Do not accept traditional galvanized, hardness 40-48HRC; according to ISO9227 salt spray test 1000H or more. Common specifications: M4, M5, M6, M8, M10, M12, M14, M16, M18, M20 and so on.    

Triple stack disc washers [NFE-3L.4L] standard, usually with French triple and quadruple stack self-locking washers, triple and quadruple combination disc spring washers. This is a high-performance locomotive special anti-loosening washer, its super anti-loosening effect is significantly better than all similar anti-loosening washer products. This product is widely used in (national defense, metallurgy, electric power, nuclear facilities, high-speed rail, subway, bus tracking, high-speed train) bridge and railroad engineering projects, and industrial and mining machinery and equipment, as well as special machinery and high vibration load machinery and equipment manufacturing and assembly areas. All products are made of SK5, SK7, SUS304, 316 (A2, A4), and other imported high-quality steel, all products are strictly hardened before leaving the factory, absolutely guaranteeing product performance. Common specifications are M4-M20.
Materials used: heat-treated high-carbon steel, the surface of the zinc-plated hydrogen or zinc-magnesium special Dacromet coating treatment, and stainless steel by the high elasticity of the hardening process.
Structural features: The washer is made of several layers (3-6 layers) laminated to provide a very strong preload.
Product characteristics of French triple stack butterfly washers: without changing the way the bolt and nut application under the premise of improving the internal preload, not easy to loosen; both flat pads and elastic pads; and ordinary elastic pads compared to the fastener force more uniform; better rigidity, not easy to be deformed; in the heat of the occasions, but also to provide a good tightening; in the high vibration occasions, the preload will not be reduced, the ordinary gaskets in the vibration reach a certain After a certain number of vibration, the preload will decrease rapidly, while the multi-layer shims will not decrease.    

Size Can also be According to the Customer's requirement please check the detailed specification sheet details PDF， CAD, 21-22Page See more product details.    

Packing: The inner packaging consists of polyfoam, while the outer layer is a carton. The carton sizes are 29*19*19.5 cm and 23.5*17.5*8 cm, respectively. The pallet dimensions are 215*100*90 cm, or they can be customized according to your requirements.