SB2N,B7,2H,UNC,85mm,5/8in,CTD Studbolts, With nut Mat spec, stud bolt(s) ASTM A193 GRADE B7 Mat spec, nut(s) ASTM A194 GRADE 2H Coating GALVANIZED AND PTFE Design spec, stud bolt ASME B18.2.1 Design spec, nut ASME 18.2.2 Type of thread UNC Number, nuts per bolt 2 Length 85 mm Size 5/8 in 8 pcs.