STUD BOLT (ANSI B16.5) ,MATERIAL FOR STUD (ASTM A193 GRADE B7 , B7M , B16 , B8 , ...) (ASTM A320 GRADE L7 , L7M , ...) , NUTS (ASTM A194 GRADE 2H , 2HM , 8 , ...)THREAD ACCORDING TO ANSI B1.1 (UNC , UNF , UNEF, 8UN , UNS, ...) tolerance class 2A,2B STUD BOLT (ANSI B16.5) ,MATERIAL FOR STUD (ASTM A193 GRADE B7 , B7M , B16 , B8 , ...) (ASTM A320 GRADE L7 L7M , ...) , NUTS (ASTM A194, GRADE 2H , 2HM , 8 , ...)THREAD ACCORDING TO ANSI B1.1 (UNC , UNF , UNEF, 8UN , UNS, ...) tolerance class 2A,2B