GB/T 97.1 nominal specification 1.6~64mm, hardness HV140 or above, A-level accuracy
Precision flat washer, used for fitting A-grade/B-grade hexagonal bolts and screws, with a smooth surface and high precision, playing a role in dispersing pressure and protecting the surface of the connected parts. Stainless steel galvanized passivation or carbon steel blackened/galvanized treatment.
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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