Bolt head diameter: 15mm; Round head height: 3.5mm; Screw length (including the neck): 3/4 inch or 19mm
Material: 304 stainless steel (A2) and no exterior finish, greater strength and corrosion resistance performance than regular stianless steel or zinc plated fasteners.
Carriage bolts have a dome shaped head and a square neck generally requiring a hex nut and flat washer. The square neck makes them self-locking when used within a square hole.