1. Diameter : Inch 1/2" to 3 1/2" , Metric M12 to M64
2.Finish: Plain (Self Color) / Black Oxide / Zinc Plated
HDG / Zinc Nickel / Cadmium Plating / PTFE
3. Raw material : 1045 / Q235
4.Standard: ASTM F436 / DIN125 / USS / SAE