GB/T 5789 (enlarged series)/GB/T 16674 (small series) thread specifications M5~M20, performance level 8.8/10.9, hexagonal head with flange face
The hexagonal head is equipped with a flange, which can disperse the pressure of the bolt head on the surface of the connected part without the need for a washer, and has an anti loosening effect. Commonly used in connection parts with high vibration such as automobiles, motorcycles, and construction machinery, as well as in building steel structure nodes.
GB/T 5789 (enlarged series)/GB/T 16674 (small series) thread specifications M5~M20, performance level 8.8/10.9, hexagonal head with flange face
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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