- Includes 30 flat round head screws M8x40 mm DIN 603 and 30 hex flange nuts M8 DIN 6923 - Galvanized carbon steel: high strength, durability, and corrosion protection - Round head and square neck: quick and secure installation, prevents rotation in wood or metal - Self-locking flange nuts: larger contact area, locking force, and safety - Easy assembly with standard tools, torque wrench recommended for better tightening - Versatile use: construction, machinery, furniture, automotive, marine applications, and home improvement - Comply with international standards, ideal for demanding mechanical and structural connections - Suitable for humid or corrosive environments, extend service life and maintain stable performance