High precision Hex hex drive flat head socket cap bolts screws.oxide finish.Different size of M3 M4 M5 screws and nuts total 460pcs in a transparent box which are commonly used size.Flat head countersunk screws which head can be better embedded in the installation surface to ensure that the surface smooth.Application: Great for indoor and outdoor use, in the home and office appliance, communication equipments, ship assembly and other machinery industry.Specifications:460-Pack Screws Nuts Assortment kit Comes in a plastic box.Package Quantity: 920 PcsColor: BlackMaterial: alloy steelSize: M3 M4 M5 (Include M3 M4 M5 Nuts)Package Contents:60 x pcs M3 x 8 nuts60 x pcs M3 x 12 nuts60 x pcs M3 x 16 nuts60 x pcs M3 x 20 nuts200 x pcs M3 nuts40 x pcs M4 x 8 nuts40 x pcs M4 x 12 nuts40 x pcs M4 x 16 nuts40 x pcs M4 x 20 nuts160 x pcs M4 Nuts20 x pcs M5 x 8 nuts20 x pcs M5 x 12 nuts20 x pcs M5 x 16 nuts20 x pcs M5 x 20 nuts80 x pcs M5 nutsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.