ASTM A193 Grade B8 Stud Bolts&A194 Grade 8 hex nuts
ASTM A193 Grade B8 Stud bolt thread specification Threads shall be Unified inch coarse thread series (UNC), Class 2A, for all stud bolt sizes 1 in. and smaller, and Unified inch 8 thread series (8 UN), Class 2A, for all stud bolts larger than 1 in., in accordance with ANSI/ASME B1.1. Acceptability of screw threads shall be determined based on ANSI/ASME B1.3. Standard: ASME B18.2.1/ASME B18.2.2, DIN975/DIN976, Diameter: 1/4"-5",M6-M125
