Usage Tips: 304 stainless steel. Stainless steel is a common material with a density of 7.93 g/cm3, also called 18/8. It has good workability and high toughness up to a temperature of about 800 degrees.Various screw sizes: M2*4 - M2*20, M3*4 - M3*30, M4* 6 - M4*30, to meet different needs. It is a very essential hand tool for the family.With M2, M3 and M4 nuts and washers, installations are now more precise with an increase in the contact surface, which reduces the pressure and protects parts and screws.Nuts and washers are arranged in a storage box, which makes it easy for you to find the series and avoid loss when needed. They are anti-oxidizable and corrosive even at high temperature. machinery and equipment, furniture and many other fields.Material 304 stainless steel.It features good workability and high toughness up to a temperature of about 800 degrees.Anti rustResistance to corrosionNo pollutionProduct Quality Premium MaterialHigh HardnessFeaturesScrew Dimension:M2*4 M2*6 M2*8 M2*12 M2*16 M2*20M3*4 M3*8 M3*12 M3*16 M2*20 M3*30M4*6 M4*10 M4*14 M4*18 M4*20 M4*3020 Pieces EachM2 Washer M2 nutM3 Washer M3 nutM3 Washer M4 Nut120 Pieces EachProfessional assortment and sizes to meet all your needs, which will bring an easier and more convenient working environment.AccessoriesM2 Hexagonal Allen Key-Diameter:1.5mm Length:16*45mmM3 Hexagonal Allen Key-Diameter:2.5mm Length:19*55mmM4 Hex Allen Key-Diameter:3.0mm Length:23*57mmWarning:The products contain small parts.Please do not let children play to avoid accidental swallowing.ApplicationThe main use of the stainless steel hex screw is very common in electronics.For electrical appliances, chemicals, water, machinery and equipment, furniture and many other areas.