High Quality M3 Flat Head Machine Countersunk Head Screw Bolts are made of high quality 304 stainless steel. 304 stainless steel has high strength and good corrosion resistance in harsh environments such as high temperature, cold and high humidity. They have superior rust resistance and excellent oxidation resistance to ensure long-term useSAFE AND SWEET Our M3 Flat Head Machine Countersunk Head Screw Bolts are made of high quality materials, eco-friendly and non-toxic. No Toxic Release During Use, Ensure Your Safety Sharp Threads - Our bolt threads are extremely sharp, clean and accurate. And the tight thread is not easy to deform and slide during the rolling process. Deep, clear screw bolt threads make your job easier. Our bolts conform to standard metric wide application M3 flat head machine countersunk head screw bolts are perfect for professionals, hobbyists, landlords, handymen, repairmen, women, carpenters, construction, plumbing, HVAC and more. This kit is great for replacing broken and lost ones. For sheet metal and wood. A variety of sizes to meet your largest requirementsNote, because there may be color and size differences between the light effect photos and the actual product, please allow 1-2 cm errorQuantity: (Pack of 50) Screws (other products not included)Size: M38mm (for reference only)Color: Stainless Steel