Product Description

【Standard Metric Sizes】The set includes 580pcs/1060pcs/1322pcs,M2, M2.5, M3, M4, M5, and M6 hex screws with nuts and flat spring lock washers. 

【High Quality】Button round head hex socket screws are made of carbon steel and finished with black oxide. Which has higher tensile strength, nearly twice as strong as stainless steel button head screws. Provides longer service life.

【Wide Applications】Widely used in all kinds of precision machinery industry, classified instruments, instruments, electronic products, printed projects, household appliances, communication products, locks, lamps, lights, toys, etc.

【Storage Box】All of the screw bolts and nuts are packed in a transparent plastic box, convenient for your storage and use. Each size screws are packed in a small bag to prevent scattered and lost. The box is designed with large and small compartments for you to take the correct screw out.