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5/16"-18 Carriage Bolt HDG

Hot Dipped Galvanized Carriage Bolts: Carriage bolts have a round smooth head with a square neck under the head. The square neck keeps the bolt from turning as a nut is tightened. These bolts are low carbon (Grade 2) steel. The Hot Dipped Galvanized coating is a thicker protective coating good for outdoor use, and recommended for use with treated lumber.

Grade: Grade 2 Diameter: 5/16
Plating: Hot Dipped Galvanized Thread Count: 18
Material: Steel Thread Length: Threaded up to 6"
Head Style: Carriage Socket Size: N/A
Head Diameter: 0.688/0.719 Square Width 0.307/0.324
Proof Load, Lb.: 2,900 Tensile Strength, Lb.: 3,900


SAE J429 Proof Load and Tensile Strength Requirements Above
Length is Measured from Under the Head to the Bottom of the Bolt

Country of Origin varies; Country of Origin is subject to change
If plating is important please send an inquiry


Length/Size Price/Each Qty
1 1/4'' $ 0.13
2 1/2'' $ 0.21
3 1/2'' $ 0.28
4'' $ 0.31
6'' $ 0.44
Length/Size Price/Pkg Qty Qty
1 1/4'' $ 12.76 100
2 1/2'' $ 20.42 100
3 1/2'' $ 26.56 100
4'' $ 29.61 100
6'' $ 21.05 50
Length/Size Price/Case Qty Qty
1 1/4'' $ 142.61 1250
2 1/2'' $ 152.12 800
3 1/2'' $ 121.69 500
4'' $ 102.68 375
6'' $ 87.28 225