Fasteners
Bolts
Hillman
$5-$25 per packHex Bolts for Heavy-Duty Through-Bolted Connections
Hex bolts are heavy-duty machine-threaded fasteners with a hexagonal head driven by wrench or socket. Used with nut and washers, they create strong through-bolted connections in wood, steel, and mixed-material assemblies.
Key Features
- Hexagonal head for wrench driving
- Through-bolt for maximum strength
- Multiple grades and materials
- Full and partial thread
- Standard SAE and metric sizes
Specifications
Material: Grade 2
5
or 8 steel; stainless; galvanized | Head: Hex cap | Thread: Full or partial | Diameters: 1/4in to 1in | Lengths: 1/2in to 12in
Best For
Beam-to-column connections
Metal connector bolting
Equipment mounting
Mixed wood/steel assembly
Compatible Materials
Dimensional lumber
Steel plates
Concrete (with anchors)
Metal connectors
Timber beams
Pros & Cons
Pros
- ✓ Calculable clamping force with torque wrench
- ✓ Easy to verify tightness
- ✓ Structural grades available
- ✓ Universal standard sizes
Cons
- ✗ Require access to both sides
- ✗ Need nut and washers
- ✗ Can loosen from vibration
Installation Tips
Use flat washers under head and nut to distribute load. Use lock washers or lock nuts for vibration-prone connections. Tighten to specified torque for bolt grade.
Frequently Asked Questions
Grade 2 general non-structural, Grade 5 standard structural, Grade 8 high-strength critical applications. Markings are stamped on head.
Partial when unthreaded shank needs to bear or align. Full thread when maximum engagement is needed.