GB/T 897 thread specifications M5~M48, nominal length 16~300mm, performance grade 4.8/8.8
Screw in the body end thread length bm=1d (equal to the thread diameter), used for screwing in hard material bodies such as steel or bronze. One end is screwed into the threaded hole, and the other end is connected with a nut, suitable for situations where the connected part is thick, inconvenient to use bolt connection, or requires frequent disassembly.
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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