... Standard diameter 5. Zinc head/ Aluminium head 1.Quality:ISO90001,ISO14000 2.Standard: GB/T8918- ... 1102-74, SC 1443-86, ISO, BS, DIN, JIS, API and RRW-410D Item Information Steel ... ,65#,70#,72A,82B StandardISO ,DIN, ASTM,JIS , etc Tensile strength1770mpa,1570mpa,1670mpa,1860mpa,1960mpa Highcarbon ... 1x37,6x7,7x7,6x37,7x37,6x19 (1.0mm-36mm)Tensile Strength:1570,1670,1770,1870MPAPacking:Usually packing ...