Studbolts, With nut Mat spec, stud bolt(s) ASTM A193 GRADE B7 Mat spec, nut(s) ASTM A194 GRADE 2H Design spec, stud bolt BS 4882 Design spec, nut ASME B18.2.2 BS 4882 Thread class symbol, stud bolt ASME B1.1 CLASS 2A Thread class symbol, nut ASME B1.1 CLASS 2B Type of thread ASME B1.1 SERIE UNC Type, nut UN HEAVY HEXAGONAL Number, nuts per bolt 2 Inspection, certif ISO 10474 -3.1B Caps code STBT B7 Length 100 mm Size 5/8 in MESC code 8138612731 70 PCS.