YOUYIDUN M4 Nuts and Bolts Set, 405 Pcs Hexagon Socket Head Cap, Hex Socket Cap Head Screws, Black Machine Screw Bolts and Nuts and Flat Washers Assortment Kit, for DIY Bicycle Motorcycle Repair

Exquisite Material: Nuts and bolts set are made of high-quality 12.9 grade alloy steel, which has good corrosion resistance, high temperature resistance, wear resistance, high hardness, oxidation resistance and durability, not easy to break or deform, and resistant to rust , can maintain good performance in harsh environments

Hex Socket Head Cap Design: The combination of Washers and hex nuts can increase the contact area, reduce pressure, prevent loosening and protect parts. Tight threads are clean, accurate, and smooth, not prone to warping during rolling. The Socket head cap design can be easily installed with a hexagonal wrench, and it is not easy to slip out

Easy to Store: All bolts and nuts set are stored in a transparent and sturdy storage box with compartments. Hex socket cap head screws are stored separately, well organized, easy to carry and find. There is no confusion during transportation and it is convenient to use

Wide Range of Applications: Suitable for electronic products, furniture installation and maintenance, household appliances, bicycles, automobiles, motorcycles and other vehicle maintenance, mechanical equipment, ship accessories and other fields. Ideal for use by professionals, woodworkers, hobbyists, landlords, repairmen, and others

Package Includes: 405 pcs in total, including 20 pcs M4x6mm, 20 pcs M4x8mm, 20 pcs M4x10mm, 15 pcs M4x12mm, 15 pcs M4x14mm, 10 pcs M4x16mm, 10 pcs M4x18mm, 10 pcs M4x20mm, 14 pcs M4x25mm , 10 pcs M4x30mm, 130 pcs M4 nuts, 130 pcs M4 washers, rich in size and quantity, to meet your needs in different occasions and fields