Description: _x000D_The washer is a thin disk-shaped plate with a hole in the middle that is normally used to distribute the load of a threaded fastener, such as a screw or nut. Other uses are as a spacer, wear pad, pre-load indicating device, locking device, and to reduce vibration. High-quality bolted joints require hardened steel washers to prevent the loss of pre-load after the torque is applied. Washers are also important for preventing galvanic corrosion, particularly by insulating steel screws from aluminum surfaces. _x000D__x000D__x000D_Features: _x000D_Made of high quality steel material, these flat washers are sturdy and has long service._x000D__x000D_Flat washers can spread a load, and prevent damage to the surface being fixed, and insulate steel screws from surface. _x000D_They can be used as a spacer, wear pad, pre-load indicating device, locking device, and to reduce vibration._x000D__x000D_Flat washer is applied when the hole is a larger diameter than the fixing nut. There are many different sizes in this set. _x000D_Each set includes many flat washers that can be used for a long time, so you don't have to run to hardware store looking for washers for quite a while. _x000D__x000D__x000D_Specifications: _x000D_Material: A3 steel _x000D_Type: Flat washer _x000D_Color: Silver _x000D_Size & Quantity: _x000D_M3*150pcs _x000D_M4*150pcs _x000D_M5*200pcs _x000D_M6*200pcs _x000D_M8*150pcs _x000D_M10*50pcs _x000D_Weight: 446g(approx.) _x000D__x000D__x000D_Package Includes: _x000D_900 x Washers 1Made of high quality steel material, these flat washers are sturdy and has long service 2Flat washers can spread a load, and prevent damage to the surface being fixed, and insulate steel screws from surface 3They can be used as a spacer, wear pad, pre-load indicating device, locking device, and to reduce vibration 4Flat washer is applied when the hole is a larger diameter than the fixing nut. There are many different sizes in this set 5Each set includes many flat washers that can be used for a long time, so you don't have to run to hardware store looking for washers for quite a while