Dome Bolts
Starting From 48Rs/Pcs
Technical Specifications of Dome Bolts In India
| Size / Diameter Range | M4 to M48 (Metric) / 1/4" to 2" (Imperial standard) |
| Length Range | 15 mm to 600 mm |
| Specification | (All sizes available) |
| Head & Neck Style Variations | Dome Head with Square Neck (Carriage Bolt), Mushroom Head, Dome Head Socket Screw, Ribbed Neck Dome Bolt, Flat Dome Bolt |
| Material Grades | Carbon Steel: IS 2062, Grade 4.6, 5.6, 8.8, ASTM A307 |
| High-Strength Alloy Steel | Class 10.9, 12.9, ASTM A193 B7/B7M |
| Stainless Steel | AISI 304 (A2-70/80), AISI 316 (A4-70/80), 316L, 321, 347, Duplex 2205 |
| High Nickel Alloy | Monel 400/K500, Inconel 600/625/718, Incoloy 800/825, Hastelloy C22/C276 |
| Specification | (All Grades available) |
| Standards & Specifications | DIN 603, ISO 8677, ASME/ANSI B18.5, BS 4933 |
| Surface Finish | Plain Black / Oiled, Hot-Dip Galvanized (HDG), Electro-Zinc Plated, Yellow Zinc Passivated, Bright Passivated (SS), PTFE Coated |
| Origin | Indian / Imported |
Sourcing Terms & Timeline
Payment Terms
Letter of Credit / Bank Transfer / Advance
Delivery Package
Mill Test Certificate (MTC) + Inspection Reports
Standard Delivery
2-5 Working Days in Maharashtra region
Custom Cuts Support
Custom length cutting & shearing facilities available
Verified Suppliers
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Benefits and Application of Dome BoltS
Benefits
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Snag-Free and Safety-Centric Profile: The rounded, low-profile dome head eliminates sharp corners and protruding edges, preventing accidental injury or clothing snags in high-traffic installations.
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Anti-Rotation Under-Head Locking: Integrated square neck or knurled shoulder locks securely into the mating surface, enabling single-person installation using a wrench on the nut side only.
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Tamper-Resistant Exterior: Absence of a drive socket or wrenching flats on the smooth dome surface deters unauthorized removal or vandalism from the exposed head side.
Applications
Dome bolts are extensively specified across industrial manufacturing, transport networks, and civil infrastructure where safety, aesthetics, and tamper resistance are vital. In highway guardrail installations and bridge safety barriers, hot-dip galvanized carbon steel dome bolts secure corrugated beam rails, providing a smooth exterior surface that prevents vehicular snagging during impacts. Rail coach manufacturing and automotive bodybuilders utilize stainless steel (304/316) dome head bolts to fasten interior paneling, seating frames, and wooden flooring where protruding bolt heads pose a trip or cut hazard to passengers. Industrial machinery builders and conveyor system manufacturers employ alloy steel dome bolts to secure protective guards, hopper liners, and enclosure panels exposed to heavy vibration. Additionally, marine infrastructure projects and coastal boardwalk developments rely on corrosion-resistant Duplex and Stainless Steel dome bolts to anchor timber and composite decking assemblies, ensuring long-term structural clamping against saltwater wash and atmospheric weathering.
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