Fasteners Bolts
Hillman Hillman Carriage Bolts
Hillman hot-dipped galvanized carriage bolts for structural wood connections — ledger-to-rim-joist, post-to-beam, and railing post connections. Dome head with square neck; tightens without tools on bolt head. Standard ASME B18.5 / ASTM A307. HDG coating approved for ACQ and CA treated lumber. Requires through-hole plus washer and hex nut. Available in 3/8 in × 3-1/2 in, 1/2 in × 4 in, and 1/2 in × 6 in.
Material
Carbon steel
Finish
Hot-dipped galvanized (HDG)
Head Type
Dome (carriage) head, square neck
Standard
ASME B18.5; ASTM A307
Treated Lumber Approved
true — HDG approved for ACQ/CA
Distribution
Home Depot, Lowe's, Ace Hardware
Model Comparison
3 models
| Specification | 3/8 in × 3-1/2 in | 1/2 in × 4 in | 1/2 in × 6 in |
|---|---|---|---|
| Model | — | — | — |
Shared Specifications
All models| material | Carbon steel |
| finish | Hot-dipped galvanized (HDG) |
| head_type | Dome (carriage) head, square neck |
| standard | ASME B18.5; ASTM A307 |
| treated_lumber_approved | true — HDG approved for ACQ/CA |
| distribution | Home Depot, Lowe's, Ace Hardware |