M3 Screws 300pcs M3x 4mm/6mm/8mm/10mm/12mm Black Alloy Steel Hex Socket Screws Nuts Washer Assortment Kit(Button Head)

Type specification complete, the quality is reliable.Material:alloy steel material.Never , beautiful,practical, and convenient for using., Widely used as electronics components in home and office appliance, communication electroplating,medical device,electronics,ship assembly and other machinery industry., Six common sizes and three optional types meet your various needs., Environment-friendly, no pollution, high hardness., Fixing component, industrial and construction fasteners.