Item Type: Screw Nut Washer AssortmentProduct Material: Carbon SteelProduct Specification: Approx.50Pcs M5 Nut60Pcs M5 Washer10Pcs M5 x 20mm / 0.79in Screw10Pcs M5 x 16mm / 0.63in Screw15Pcs M5 x 12mm / 0.47in Screw15Pcs M5 x 8mm / 0.31in Screw90Pcs M4 Nut90Pcs M4 Washer20Pcs M4 x 20mm / 0.79in Screw20Pcs M4 x 16mm / 0.63in Screw20Pcs M4 x 12mm / 0.47in Screw20Pcs M4 x 8mm / 0.31in Screw140Pcs M3 Nut140Pcs M3 Washer30Pcs M3 x 20mm / 0.79in Screw30Pcs M3 x 16mm / 0.63in Screw30Pcs M3 x 12mm / 0.47in Screw30Pcs M8 x 8mm / 0.31in Screw140Pcs M2 Nut140Pcs M2 Washer30Pcs M2 x 20mm / 0.79in Screw30Pcs M2 x 16mm / 0.63in Screw30Pcs M2 x 12mm / 0.47in Screw30Pcs M2 x 8mm / 0.31in ScrewPackage List420 x Nut430 x Washer370 x Screw1 x Storage Box1Various Parts: This fastener assortments including flat head hex socket screws, hex nuts and washers in various sizes for your working needs. 2Firmer Fixing: Clear thread ensures firm fixing without slipping, while the sturdy structure can withstand high pressure, safe and reliable. 3Wide in Using: Widely used in various accuracy machinery, sorting instruments, meters, electronic products, household appliances and so on. 4Good Material: Using premium carbon steel material with high strength, which also has excellent durability under high and low temperature. 5Easy to Install: Light weight together with compact size will bring more convenience to the installation, saving the time and labour.