5/16"-18 x 2 1/2" Carriage Bolts / Low Carbon Steel / Hot Dip Galvanized
- Steel
- Hot Dipped Galvanized
- 18 TPI · Coarse
- ASME B18.5
$51.73
$1.29 / pc
Package of 40
Volume pricing: the bulk box price per piece is shown above. Need more? Request a quote →
Net 30 terms for approved accounts. Apply for wholesale →
Product Description
5/16"-18 x 2 1/2" Carriage Bolts / Low Carbon Steel / Hot Dip Galvanized
Frequently Asked Questions
Why does a carriage bolt have a square neck?
The square neck beneath the round head wedges into the wood as the nut is tightened, preventing the bolt from rotating. This allows tightening from one side only — perfect for deck and fence construction where you can not access the back side of the bolt.
How long will the galvanized coating last outdoors?
Hot Dipped Galvanized fasteners have a thick zinc coating that provides excellent outdoor corrosion protection — typically 20-50+ years in moderate environments. For coastal/marine use, consider stainless steel for longer life.
$51.73
$1.29/pc
Carriage Bolts / Steel / Hot Dip Galvanized
Family: CG
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5/16"-18 x 2 1/2" Carriage Bolts / Low Carbon Steel / Hot Dip Galvanized
SKU: 3140CG-40
Technical Specifications
Thread Size
5/16"-18
Thread Series
UNC
Thread Pitch
18 TPI
Length
2 1/2"
Material
Steel
Finish
Hot Dipped Galvanized
Head Style
Round Head
Standard
ASME B18.5
Country of Origin
Import
Measurement System
Inch
SKU
3140CG-40
https://www.ecomfasteners.com/products/5-16-18-x-2-1-2-carriage-bolts-steel-hot-dip-galvanized · Printed