... application:flange,valve,wellhead astm a193 conformed stud bolts stud for industrial usagespec: M12 ,M16 etc stud application:flange,valve,wellhead ... botts, our enjineers aslo can design and work for u accordingly . SpecM27X125 ,M30x145,M30x205 and so on .Normstud :astm a193 , nuts:astm ... , manifolds etc , which have been export to middle east and north america regularly ,plz feel easy to let us know ...