Material: 304 stainless steel (A2-70) with special black coated treatments, greater strength and better corrosion resistance performance than regular stainless steel or zinc plated fasteners. No scratches, No Burrs. Excellent appearance.
Bolt head diameter: 0.59 inch (15mm); Bolt head height: 0.14 inch (3.68mm); Bolt length (including the square neck): 1.5 inch (38mm)
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. The smooth, domed head provides a semi-flush finish.