6mm-1.0 x 40mm Zinc Class 8.8 Carriage Bolts (8 pcs.)

Diameter: 6mm
Length: 40mm
Material: Steel
Finish: Red Rinsed Zinc
Head Style: Carriage
Thread Size: 1.0mm (Coarse)
Thread Length: 18mm
Hardness: Class 8.8
Style: Short Neck
Type: Carriage Bolt

Box of 8.

A carriage bolt has a domed or countersunk head, and the shank is topped by a short square section under the head. The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened.