5/16"-18 x 4 1/2" Carriage Bolts / Full Thread / Steel / Black Oxide
$175.07
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Product Description
5/16"-18 x 4 1/2" Carriage Bolts / Full Thread / Steel / Black Oxide
Specifications
| Material | Steel |
|---|---|
| Finish | Black Oxide |
| Size | 5/16"-18 |
| Length | 4 1/2" |
| Head Style | Round Head |
| Drive | No Drive |
| Thread Pitch | 18 TPI |
| Thread Class | Coarse |
| Standard | ASME B18.5 |
| RoHS Compliance | RoHS Compliant |
| Measurement System | Inch |
RoHS Compliant
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.
Does Black Oxide finish provide corrosion protection?
Black Oxide provides mild corrosion resistance through a controlled oxidation process. It is dimensionally stable (no plating buildup), will not chip or flake, and is suitable for indoor use. For outdoor or wet environments, additional oil coating or a different finish (zinc, stainless) is recommended.
Carriage Bolts / Full Thread / Steel
Family: CBFT
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Technical Specifications
Thread Size
5/16"-18
Thread Type
Coarse (UNC)
Material
Steel
Head Style
Round Head
Thread Pitch
18 TPI
SKU
3172CB-300