Yidao Metal New Products: 22mm Left Hand Rock Bolt | Grade 420 & Grade 520 High Tensile Rock Bolt
We newly added high-quality 22mm Left Hand Thread Rock Bolts in Grade 420 and Grade 520, specially engineered for underground mining, tunnel stabilization and slope support projects.
Different from standard right-hand bolts, left-hand thread rock bolts feature reverse thread design, which effectively avoids loosening under strong rock vibration and heavy ground pressure. It provides safer locking performance in complex stratum conditions.
Product Specifications
• Diameter: 22mm
• Strength Grade: GR280 / Gr420 / Gr520
• Thread Type: Full Left Hand Thread
• High tensile strength & excellent ductility
• Stable load-bearing capacity
• Anti-loosening & anti-vibration performance
Application
Underground mine support, tunnel primary & secondary support, roadway reinforcement, slope stabilization and geotechnical engineering anchoring.
We provide complete matching accessories: left-hand dome nuts, dome plates and couplers.
Custom length, hot-dip galvanized and epoxy coating services are available.
Stable quality, factory direct price and fast bulk delivery.
Welcome global contractors and distributors for inquiry and cooperation.
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