High precision Hex hex drive flat head socket cap bolts screws. oxide finish. Different size of M3 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 to that the 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 Pcs Color: Black Material: alloy steel Size: M3 M5 (Include M3 M5 Nuts) Package Contents: 60 x pcs M3 x 8 nuts 60 x pcs M3 x 12 nuts 60 x pcs M3 x 16 nuts 60 x pcs M3 x 20 nuts 200 x pcs M3 nuts 40 x pcs x 8 nuts 40 x pcs x 12 nuts 40 x pcs x 16 nuts 40 x pcs x 20 nuts 160 x pcs Nuts 20 x pcs M5 x 8 nuts 20 x pcs M5 x 12 nuts 20 x pcs M5 x 16 nuts 20 x pcs M5 x 20 nuts 80 x pcs M5 nuts Only 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.