1680 Pcs M2 M3 M4 M5 Metric Hex Head Bolts And Nuts And Washers Set, Hex Socket What are the advantages of our metric socket head bolt assortment? Superb Material: The bolts and nuts kit is made of high-quality alloy steel, with exquisite workmanship, high hardness, strong and not easy to break, not easy to deform, corrosion-resistant, not easy to rust, and can maintain good performance in any environment. Hex Socket Head Cap Screws Bolts and Nuts and Washers Kit: The thread is tight and the force is uniform, it is not easy to deform and slide during rolling and installation, it can withstand greater loads, and it can ensure the stability of the installation. After installation, the whole screw cap sinks into the inside of the workpiece, which can keep the surface of the workpiece flat and beautiful. Equipped with Nuts and Flat Washers: Hex nuts can make your installation more precise and fasten better, providing strong holding force and clamping force; washers can increase the contact area, distribute pressure, protect the nuts and bolts, and prolong the use time. Wide Range of Uses: Widely used in household appliances, automobile assembly, product manufacturing, precision machinery industry, electronic products, communication products, lamps, toys, maintenance and other fields. Ideal for professionals, maintenance personnel, carpenters, landlords, handymen, repairmen and more. Package Includes: You will receive 1680 pcs in total, size includes: 2#*5/32"(m2*4mm), 2#*1/4"(m2*6mm), 2#*3/8"(m2* 10mm), 2#*1/2"(m2*12mm), 4#*1/4"(m3*6mm), 4#*5/16"(m3*8mm), 4#*1/2"( m3*12mm), 4#*5/18"(m3*16mm), 8#*5/16"(m4*8mm), 8#*1/2"(m4*12mm), 8#*5/8 "(m4*16mm), 8#*7/8"(m4*20mm), 3/16*1/2"(m5*12mm), 3/16*5/8"(m5*16mm), 3/ 16*7/8"(m5*20mm), 3/16*1"(m5*25mm), including nuts and flat washers of corresponding size.