Triple Fold, Four Fold Disc Washer

Four stack disc washer NFE4L This is a high-performance locomotive special anti-loosening washer, Its superb anti-loosening effect is superior to all similar anti-loosening washer products!
Name： Four stack disc washers NFE4L
Main material: 60Si2Mn.50CrVA or SUS304.316 (A2.A4) and other special customized materials.
Surface treatment: Stainless steel hardened and polished natural color or spring steel phosphate black, mechanical zinc plating, nickel plating, Dacromet coating treatment. Traditional zinc plating is not accepted, hardness is 40-48HRC.
Common specifications: M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M36, M39, M42, M45, M48, M52, M56, M60 and so on.    

Four stack disc washers NFE4L, also known as French four stack self-locking washers, four combinations of disc spring washers, is a high-performance locomotive special anti-loosening washer. Its superb anti-loosening effect is superior to all similar anti-loosening washers! This product is widely used: in national defense, metallurgy, electric power, nuclear facilities, high-speed rail, subway, bus track, high-speed trains, bridge and railroad projects industrial and mining machinery and equipment, special machinery and high vibration loads in the field of machinery and equipment manufacturing and assembly. SK5.SK7.SUS304.316 (A2.A4.) and other imported high-quality steel. After strict hardening treatment absolute guarantees product performance, Commonly used specifications are M4-M20 are in stock and molds.
Characteristics: In general, ordinary gaskets have been loosened 300,000 times, while the multi-layer pads after 1 million times, but also well well-maintained tight state.
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 high elasticity hardening treatment.
Structural features: The shims are made of several layers (3-6 layers) laminated to provide a very strong preload.
Features: without changing the way the bolt and nut application, can improve the internal preload, not easy to loosen; both flat pads and elastic pads; and ordinary spring pads compared to the fastener force is more uniform; better rigidity, not easy to deform; in the heat of the occasion, but also can provide good fastening; in the high vibration occasions, the preload will not be reduced, as follows, the ordinary gasket in the vibration after reaching a certain number of times, the preload force of ordinary shims decreases rapidly after a certain number of vibrations, while that of multilayer shims does not.    

Size Can also be According to the Customer's requirement please check the detailed specification sheet details PDF， CAD, 19-20Page 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.