NFE25511 French washer&Conical Knurled Spring Washers, Symbol

French lock washers are divided into standard Z, large M, and wider L, respectively, used in the head of smaller or larger bolts, the greater the contact preload and locking effect is better!
Name: French lock washers NFE2511 - Z.M.L
Main material: S60C 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. (Manufacturing hardness requirement: 42-47HRC)
Common specifications: M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, etc.    

The main functions of the product:
1. It ensures even stress distribution on the tightened parts when installing the shims to the flats.
2. because of the striations on the shims, it prevents loosening of the threads of the screws or nuts.
3. Because they are elastic, they compensate for the sinking of the assembled material, minimizing pressure loss
4. It is a disc-type improved product quality in accordance with the DIN6796 standard, The working principle is to use the tension generated by the rebound of the product after the force to play the role of anti-loosening and anti-slip. French lock washer preload anti-loosening effect is better than disc washers, In the European railroad industry and electrification equipment has been a large number of use and verification of the field, the surface increases the tooth pattern can effectively improve the anti-loosening coefficient!
French lock washers are divided into standard type Z, plus large M, and wider type L, respectively, used in the head of smaller or larger bolts, the larger the contact preload and locking effect is better!
NFE25511 French washers manufacturing process to implement the standard production, specifications: M3-M20 for the standard model, can also be customized according to customer demand, the main materials are spring steel, 65Mn, SUS304.316.A2.A4, etc., hardening grade: HV350, in line with the 10 strength level.
Stainless steel French lock washers by hardening treatment will be slightly magnetic, and material composition and salt spray will not change! Surface treatment: galvanized, Dacromet, Jumet.
Widely used in electronic control cabinets, electrical equipment, railroads, subways, electromechanical equipment, communication equipment, elevators, rolling stock assembly, medical machinery support, and the special equipment assembly industry.    

Size Can also be According to the Customer's requirement please check the detailed specification sheet details PDF， CAD, 33-34 Page 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.