Taiss 220PCS M4 Screw Kit M4 x 30/35/40/45/50mm,Black Hex Socket Head Cap Metric Screws,Bolts and Nuts Washers Assortment Kit,12.9 Grade Alloy Steel Bolts for 3D Printer
M4 screw kit,Hex Socket Head Cap Screw and Nut,Lock Washer/Flat Washer,Equipped with hexagon wrench,easy to install and use.different sizes can meet your different needs.
M4 bolts is made of 12.9 grade alloy steel,and its surface is treated by black oxidation,which has high hardness,wear resistance and oxidation resistance,and is not easy to rust and has long service life.
Widely used in various electronic products,precision machinery industry,classified instruments,meters,printing engineering,3D printers,household appliances,lamps,toys and so on.