Metric threaded M2 M3 M4 M5 button head screws washers and nuts assortment kit with the bolts length ranging from 8mm-20mm.Material of 12.9 grade alloy steel, high strength, high temperature resistance, cold, high humidity and other harsh environment., suitable for DIY, 3D printing projects, or replace broken and missing screwsIncludes M2 / M3 / M4/ M5,4 size nuts and button head bolts、match Flat washers, and Hex Wrenches all neatly fitted in a sturdy box，total 1500 pieces.Widely used in variety of precision machinery, classification instruments, electronics, household appliances, communication products and other small repair work .For a complete list what the kit includes scroll down or click see more product details.
