Hexagon socket set screws:
1. According: DIN913. 914. 915. 916.
2. Material: SCM435.
3. Hardness: HRC45-53.
4. Surface plating: black oxide.
1. Class 8.8: (1) Materials 10B33. 10B21(carbon steel). (2) Tensile strength(min) 880 N/ mm2. (3) Hardness HRC22-32. 2. Class 12.9: (1) Materials SCM435. (2) Tensile strength(min) 1220 N/ mm2. (3) Hardness HRC39-44. 3. Class 14.99: (1) Materials SCM440. SNCM439. (2) Tensile strength(min) 1440 N/ mm2. (3) Hardness HRC40-49. 4. Class A2: (1) Materials 302HQ . (2) Tensile strength(min) * . (3) Hardness *.