1. Diameter : Inch 1/2" to 2 1/2" , Metric M12 to M64
2. Length: 40MM to 300MM / BLANK BODY
3.Finish: Plain (Self Color) / Black Oxide / Zinc Plated
HDG / Zinc Nickel / Cadmium Plating / PTFE
4. Raw material : B7 / 40CR / 1035 / 1045 / Q235
5.Standard: ASTM A193 B7 , ASTM A325 / A325M ; A307B