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 flange bolt. Carbon steel substrate professionally blackened. Rust-resistant, wear-resistant, and non-reflective with a matte finish. The flange provides even pressure distribution and strong fastening. Cost-effective. Suitable for mechanical seals, equipment flange connections, basic pipeline fixing, and similar applications.