12mm-1.75 x 20mm Zinc Class 8.8 Carriage Bolts (66 pcs.)

Diameter: 12mm
Length: 20mm
Material: Steel
Finish: Red Rinsed Zinc
Head Style: Carriage
Thread Size: 1.75mm (Coarse)
Thread Length: Full
Hardness: Class 8.8
Style: Short Neck
Type: Carriage Bolt

Box of 66.

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.