This standard specifies the structural and dimensional requirements for polished rod tolerances with t9MJ threaded cross-recessed short thread flat head bolts (hereinafter referred to as bolts) made of A286 and with a strength grade of 1100MPa. This standard is applicable to bolts made of A286 and with a strength grade of 1100N MPa. Polished rod tolerance MJ thread cross-embedded short thread flat head bolt.
HB 8320-2013 history
2014HB 8320-2013 A286 polished rod tolerance band f9MJ thread cross recessed short thread flat head bolts