Hillman 1 2 in. x 1 1 2 in. Zinc Plated Steel Carriage Bolt, Coarse Thread, 50 Pack Flat Head Nails Pair it with pale oaks Sill Pan Flashing Pair it with pale oaks or cool concrete tones to create a seamless Heavy duty Grip Rite spike nails deliver extra length and thicker gauge for fastening timbers Q: Are the threads coarse or fine Specification Details Diameter 1 2 inch Length 1 1 2 inch Material Steel Finish Zinc Plated Thread Type Coarse Unit of Measurement SAE Grade 2 Number in Package 50 Packaging Type Boxed Head Type Carriage (dome head with square neck) Intended Use Fasten wooden face to wood or metal frame Package Dimensions 4