... application:flange,valve,wellhead astm a193 conformed stud bolts bolt with nuts spec: M12 ,M16 etc stud application:flange, ... valve,wellhead astm a193 conformed stud bolts ,studded bolt with nuts,screw stud Pls have some general specs ... ,M30x145,M30x205 and so on .Normstud :astm a193 , nuts:astm a194usage valve,flange,wellhead connetctiondelivery portshanghaipaymentTTDear friends :How are ...