Model no.: a307, gradea Type: hexagon head Head style: hexagonal Grade: 8.8 Finish: hot galvanizing Surface treatment: h.D.G Port: ningbo Transport package: bulk packed in 25kgs carton then 900kgs pallet Origin: ningbo, china Material: carbon steel Connection: common bolt Standard: ansi Application: building Diameter: 1/2"-1" Heat treatment: yes Trademark: sd Specification: a307 Standard A307 hex wood screw, h.D.G Grade Gradea Size 1/2"-1" Surface treament Black, zinc plated, zinc (yellow) plated, h.D.G. Etc. Material Carbon steel, stainless steel, etc