Industrial Fastener · Bolts Series
Step Bolt
Step bolts are heavy-pattern carriage-style bolts with a wide, low-profile round head and a square neck. The head is wider than a standard carriage bolt to provide larger bearing surface. They are widely used in transmission tower assembly and large timber connections.
Product Overview
Step Bolt sourcing essentials
Step bolts are heavy-pattern carriage-style bolts with a wide, low-profile round head and a square neck. The head is wider than a standard carriage bolt to provide larger bearing surface. They are widely used in transmission tower assembly and large timber connections.
Round head, square neck (similar to carriage but heavier)
Carbon steel, often hot-dip galvanized
Transmission towers, communication towers, heavy timber
Inspection records, lot labels, certificate options, and destination-ready packing.
Technical Data
Specification range
Final dimensions, mechanical properties, finish, and packing are confirmed against the RFQ and applicable standard.
| Form | Round head, square neck (similar to carriage but heavier) |
|---|---|
| Diameter Range | M16 – M24 / 5/8" – 1" |
| Material | Carbon steel, often hot-dip galvanized |
| Application | Transmission towers, communication towers, heavy timber |
Common surface finishes
Select an option to review its sourcing note. Exact coating system, thickness, and corrosion requirement are confirmed with the order.
Quality Control
Checked before consolidation and export
Each order is matched to the specified standard and verified at practical control points before shipment.
RFQ confirmation
Standard, size, grade, pitch, finish, certificates, packing, and destination are locked before production.
Lot verification
Critical dimensions, thread fit, markings, finish appearance, and packing labels are sampled and recorded.
Shipment approval
Photos and required reports are organized before consolidated loading and export documentation.
Buyer Questions
Frequently asked questions
How are step bolts different from carriage bolts?
A step bolt has a much wider, flatter head than a carriage bolt of the same diameter, providing greater bearing area on the underlying surface. Step bolts are also typically supplied in larger diameters and HDG finish suited to outdoor utility structures.
Ready to quote Step Bolt?
Send the standard, size, grade, finish, quantity, packing requirement, and destination. Availability and lead time are confirmed with the inquiry.