5/16"-18 x 5 1/2" Carriage Bolt, Full Thread / Grade A Steel / Hot Dip Galvanized
- Steel
- A307 Grade A
- Hot Dipped Galvanized
- 18 TPI · Coarse
- ASME B18.5
$107.29
$2.15 / pc
Package of 50
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Product Description
5/16"-18 x 5 1/2" Carriage Bolt, Full Thread / Grade A 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.
$107.29
$2.15/pc
Carriage Bolt / Grade A Steel / Hot Dip Galvanized
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5/16"-18 x 5 1/2" Carriage Bolt, Full Thread / Grade A Steel / Hot Dip Galvanized
SKU: 490048-50
Technical Specifications
Thread Size
5/16"-18
Thread Series
UNC
Thread Pitch
18 TPI
Thread Coverage
Full Thread
Length
5 1/2"
Material
Steel
Grade
A307 Grade A
Finish
Hot Dipped Galvanized
Head Style
Carriage (Round)
Standard
ASME B18.5
Tensile Strength
60000
Hardness
B69 - B100
Measurement System
Inch
SKU
490048-50
https://www.ecomfasteners.com/products/5-16-18-x-5-1-2-carriage-bolt-full-thread-grade-a-steel-hot-dip-galvanized-astm-a307-grade-a-asme-b18-5 · Printed