Sturdy & Durable: BNUOK M3 socket head cap screws are made of high-quality 12.9 Grade alloy steel, which has high hardness, good rust resistance, strong and durable. It has good corrosion resistance and can be used for a long time M3-0.5 Bolt Specification : Thread Diameter, 3mm; Thread Pitch, 0.5mm; Thread Length, 10mm; Head Diameter, 5.5mm; Head Height, 3mm; Drive Type, Allen Hex Socket; Allen Hex Drive Size, 2.58mm Wide Applications:The m3 screw is widely used for 3D printers, RC car, machinery repair, instruments, electronic products, DIY Project, household appliances, lamps, cabinets and bicycle repair Well-made M3 Screws: M3 x 10mm screws is features a design with a hex socket drive that provides more torque and more stable performance.These m3 bolts with clean threads, uniform pitch, no residual burrs, true to size Package Included: You will get 120pcs M3 bolts and 1pcs hex spanner.We promise a 24-month warranty, if you have any problems, please feel free to contact us, we will solve your problem within 24 Hours.