GB/T 5781 Thread specifications M5~M64, full thread, nominal length 20~300mm, performance grade 4.6/4.8
The rough hexagonal bolt with threaded screw is suitable for situations where the thickness of the connected part is large or the connection position needs to be adjusted. Commonly used in temporary support, equipment base installation, and building formwork reinforcement.
Guozhi Technology's cold heading machines deliver precision, reliability, and intelligent performance — the smart choice for modern fastener manufacturing.
Certified by China National Quality Supervision and Testing Center, ensuring every component meets precision-grade manufacturing standards.
Intelligent control system boosts production efficiency by over 30%, with failure rates well below the industry average.
14B and 41B models are listed in Hebei Province's "First Set of Major Technical Equipment" catalog — nationally recognized quality.
Comprehensive technical support from installation and commissioning to after-sales maintenance, ensuring long-term reliable operation.
Reach out to our specialists! Share your project requirements and explore customized high-strength fastener solutions for worldwide industries.
