Material: Carbon steel
Strength grades: 4.8, 8.8, 10.9, 12.9
Surface finishes: Plain / natural, blue-white zinc plated, yellow zinc plated, hot-dip galvanized, tempered blackened, Dacromet
High-strength blackened hex socket head cap screw. The surface is treated with a high-temperature oxidation blackening process, resulting in a uniform black finish with a clean, understated appearance. Cost-effective with a moderate friction coefficient. Provides basic rust resistance. Easy to install. Suitable for indoor machinery, equipment assembly, mold processing, and general fastening applications where high aesthetics are not required.