Product Description: ● Screw size : M5 ● Screw length : 6mm-250mm ● Screw type : Half Tooth / Full Tooth ● Screw color : black (uncoated) ● Screw material : high strength carbon steel grade 12.9 ● Product strength : Grade 12.9 ●Head type: Hexagonal ~Features of the screw. The product is made of high-strength carbon steel grade 12.9 with high toughness, good cold and hot workability, excellent machinability, etc. ~ Screw application. Grade 12.9 bolt material, commonly known as high-strength bolts, is suitable for steel frame structure beam-column connection, solid web beam connection, industrial plant heavy crane beam connection braking system and the connection of important structures subjected to dynamic loads Hello Dear Customer: if you need a large number of or customized hardware products, please contact us, we can provide good prices and better service. Package Include: According to your choose. Please Select Size And Quantity Pack From Drop Down Option Above.