Mine Dome Nut
Mine Dome Nut | High Tensile Spherical Mushroom Head Nut for Mining Roof Support
Mine Dome Nut, also known as mining spherical nut, mushroom head anchor nut or domed rock bolt nut, is a professional high-strength fastener specially designed for underground mining, tunnel excavation, slope stabilization and geotechnical support projects. Different from standard hexagonal nuts, its unique arched dome structure realizes uniform pressure bearing, effectively solves stress concentration problems, and greatly improves the stability and safety of mine roof support systems. As a core matching accessory for rock bolts, fully threaded bars and self-drilling anchor bolts, this dome nut has become a standard essential component for global mining and tunnel engineering support systems.
Superior Product Features & Performance Advantages
Our high-performance mining dome nut adopts integral hot forging technology, with compact structure, no internal cracks and stable mechanical properties, perfectly adapting to high-pressure, vibration and humid underground working environments.
- Uniform Pressure Distribution: The smooth spherical dome fits closely with the mining bearing plate, disperses bolt tension evenly on the contact surface, avoids local plate deformation and support loosening, and effectively prevents roof falling and rock burst risks.
- High Tensile & Deformation Resistance: Made of high-quality carbon steel and alloy steel, reaching 8.8/10.9 high tensile grade. The integral forging process ensures strong compression resistance and crack resistance, suitable for deep mines and high-stress rock stratum support.
- Excellent Anti-Loosening & Protective Effect: The domed design covers and protects exposed bolt threads, preventing thread abrasion, dust pollution and corrosion, avoiding nut jamming and failure, and extending the service life of the entire support assembly.
- Flexible Surface Treatment: Supports black oxide finish for dry mine roadways and hot-dip galvanized finish for water-rich tunnels and humid working conditions, with outstanding rust and corrosion resistance.
- Easy & Efficient Installation: Standard precision internal threads perfectly match various specifications of rock bolts and anchor bars. It can be quickly installed with pneumatic wrenches, greatly improving on-site construction efficiency.
Product Specifications & Standards
We provide full-size spherical mine dome nuts to meet diverse engineering demands, with complete specifications and customizable sizes. All products strictly comply with DIN 74361 mining industry standards, with accurate thread tolerance and reliable dimensional consistency.
- Common Sizes: M16, M20, M24, M30, M32, M36, M42, M64 (custom non-standard sizes available)
- Main Materials: 45# carbon steel (cost-effective for conventional projects), 40Cr alloy steel (high strength for deep mining)
- Surface Finishes: Black oxide, hot-dip galvanized, plain forged
- Applicable Grade: 8.8 / 10.9 high tensile grade
Wide Application Scenarios
Mining dome nuts are widely used in heavy-duty geotechnical support fields, serving as key fastening parts for anchor support systems:
- Underground coal mine and metal mine roof & side wall support
- Highway, railway and water conservancy tunnel surrounding rock stabilization
- Mountain slope reinforcement, landslide control and foundation pit support
- Self-drilling anchor bolt engineering and resin anchoring support projects
Factory Supply & Custom Service
We are a professional mine dome nut manufacturer with mature production technology and sufficient inventory. We support bulk wholesale, OEM customization, logo engraving and special specification processing. Strict quality inspection is implemented for each batch of products, with complete test reports to meet international engineering acceptance standards.
Adhering to factory direct sales, we eliminate intermediate links, provide competitive ex-factory prices and stable delivery capacity. Whether for conventional engineering bulk orders or special customized projects, we can provide high-quality high tensile mine dome nuts and one-stop fastening solution support.
Core Keywords for Reference
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