GB/T 845 thread specifications ST2.2~ST9.5, nominal length 6.5~50mm, carburizing steel quenched and hardened
Pan head cross groove, the thread is a self tapping special thread (with a large pitch and a tooth angle of 60 °), and the end has a tapered end. It can be directly screwed into metal sheets, plastics, and non-ferrous metals without pre threading. Used for fixing metal plates, aluminum alloy profiles, building light steel keels, color steel plates, etc.
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.
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