Countersunk step bolts are specialized structural fasteners combining a countersunk flat head with a stepped shank design, ensuring flush mounting in heavy-duty assemblies while providing secure grip and precise alignment. These step bolts with countersunk head are ideal for construction, steel structures, towers, and industrial machinery installations.
๐ฉ What is a Countersunk Step Bolt?
A countersunk step bolt features:
- Head Type: Flat countersunk head for flush surface installation
- Shank Design: Stepped shank diameter for structural mounting or tower assembly
- Thread Types: Metric coarse or UNC/UNF threads
- Material Options: Carbon steel, stainless steel (304 / 316), alloy steel
- Diameter Range: M6, M8, M10, M12, M16, M20, M24
- Length: From 30mm to 250mm or customized per engineering drawing
These countersunk structural step bolts provide strength, safety, and aesthetic advantages in construction and electrical tower assembly projects.
โ Key Specifications
- Thread Size: M6 โ M24 standard, custom options available
- Head Type: Countersunk flat head with stepped shank
- Material Grades:
- Carbon Steel (Grade 4.8 / 8.8 / 10.9): general structural use
- Stainless Steel 304 / 316: corrosion-resistant applications
- Alloy Steel: high tensile strength for heavy-duty installations
- Surface Treatments: Zinc plated, hot-dip galvanized, plain, black oxide
โ๏ธ Applications of Countersunk Structural Step Bolts
โ Transmission towers and electrical poles โ stepped shank provides secure fitment
โ Structural steel connections โ flush countersunk head avoids protrusion hazards
โ Heavy machinery assembly โ strong anchoring with stepped shank design
โ Construction of bridges and towers โ durable structural fastening with safety and aesthetics
โ Industrial installations โ ensures vibration resistance and flush finish
๐ง Advantages of Choosing Our Countersunk Step Bolts
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Flush head design improves aesthetics and safety
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Stepped shank ensures precise structural alignment
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High tensile strength suitable for heavy structural and tower projects
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Corrosion-resistant options extend service life in outdoor installations
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OEM & ODM customization for dimensions, threading, head type, material, and coating
๐ฆ Packaging & Supply Details
- MOQ: 500 pcs per size
- Packaging: Bulk cartons with pallets / small boxes with labels / OEM branded packaging
- Lead Time: 10โ20 working days depending on order size and customization
- Customization: Diameter, length, head type, thread type, material grade, coating, branding
๐ก Why Choose Our Countersunk Step Bolts?
As a professional countersunk step bolt manufacturer and supplier, we provide:
โ Strict quality control from raw material sourcing to CNC machining and final inspection
โ Competitive factory pricing with stable long-term supply
โ OEM & ODM services for tower manufacturers, structural steel fabricators, construction hardware brands, and fastener distributors
โ Export experience to Europe, North America, Southeast Asia, and the Middle East
๐ Learn More
Looking for reliable countersunk structural step bolts to ensure secure, flush, and long-lasting fastening in your engineering projects?
๐ Visit our product page here to view detailed specifications and place your order directly with the factory.
๐ฉ Contact Us Today
Get in touch for technical drawings, CAD support, free consultation, and factory-direct quotations to support your tower construction, structural steel, and industrial installation projects.