Step Bolt — Round Head, Square Neck (Heavy Carriage)
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.
Specifications
| 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 |
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.
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